<?xml version="1.0" encoding="UTF-8" standalone="yes" ?>
<!DOCTYPE bugzilla SYSTEM "https://bugs.webkit.org/page.cgi?id=bugzilla.dtd">

<bugzilla version="5.0.4.1"
          urlbase="https://bugs.webkit.org/"
          
          maintainer="admin@webkit.org"
>

    <bug>
          <bug_id>150902</bug_id>
          
          <creation_ts>2015-11-04 13:45:57 -0800</creation_ts>
          <short_desc>Using emitResolveScope &amp; emitGetFromScope with &apos;this&apos; that is TDZ lead to segfault in DFG</short_desc>
          <delta_ts>2015-11-05 14:22:20 -0800</delta_ts>
          <reporter_accessible>1</reporter_accessible>
          <cclist_accessible>1</cclist_accessible>
          <classification_id>1</classification_id>
          <classification>Unclassified</classification>
          <product>WebKit</product>
          <component>JavaScriptCore</component>
          <version>WebKit Nightly Build</version>
          <rep_platform>Unspecified</rep_platform>
          <op_sys>Unspecified</op_sys>
          <bug_status>RESOLVED</bug_status>
          <resolution>FIXED</resolution>
          
          
          <bug_file_loc></bug_file_loc>
          <status_whiteboard></status_whiteboard>
          <keywords></keywords>
          <priority>P2</priority>
          <bug_severity>Normal</bug_severity>
          <target_milestone>---</target_milestone>
          
          <blocked>149338</blocked>
          <everconfirmed>1</everconfirmed>
          <reporter name="GSkachkov">gskachkov</reporter>
          <assigned_to name="Nobody">webkit-unassigned</assigned_to>
          <cc>commit-queue</cc>
    
    <cc>fpizlo</cc>
    
    <cc>ggaren</cc>
    
    <cc>saam</cc>
          

      

      

      

          <comment_sort_order>oldest_to_newest</comment_sort_order>  
          <long_desc isprivate="0" >
    <commentid>1139424</commentid>
    <comment_count>0</comment_count>
    <who name="GSkachkov">gskachkov</who>
    <bug_when>2015-11-04 13:45:57 -0800</bug_when>
    <thetext>Using emitResolveScope &amp; emitGetFromScope with &apos;this&apos; that is TDZ lead to segfault in DFG

link to the dump is https://gist.github.com/gskachkov/e658e5b68518dfde1eb7#file-dfg-dump-L204</thetext>
  </long_desc><long_desc isprivate="0" >
    <commentid>1139514</commentid>
    <comment_count>1</comment_count>
    <who name="Saam Barati">saam</who>
    <bug_when>2015-11-04 18:28:47 -0800</bug_when>
    <thetext>Some clarification:
This issue was found for the arrow function implementation where we&apos;re going to store &quot;this&quot; in an activation. We load this from the activation, and we end up killing the tdz check which obviously shouldn&apos;t happen (while inside a derived constructor).</thetext>
  </long_desc><long_desc isprivate="0" >
    <commentid>1139626</commentid>
    <comment_count>2</comment_count>
      <attachid>264867</attachid>
    <who name="GSkachkov">gskachkov</who>
    <bug_when>2015-11-05 08:23:15 -0800</bug_when>
    <thetext>Created attachment 264867
Patch

Later I will be add benchmark test result</thetext>
  </long_desc><long_desc isprivate="0" >
    <commentid>1139627</commentid>
    <comment_count>3</comment_count>
      <attachid>264868</attachid>
    <who name="GSkachkov">gskachkov</who>
    <bug_when>2015-11-05 08:24:08 -0800</bug_when>
    <thetext>Created attachment 264868
Patch

Later I will beadd benchmark test result</thetext>
  </long_desc><long_desc isprivate="0" >
    <commentid>1139704</commentid>
    <comment_count>4</comment_count>
    <who name="GSkachkov">gskachkov</who>
    <bug_when>2015-11-05 12:16:51 -0800</bug_when>
    <thetext>Warning: refusing to run CompressionBench because &quot;CompressionBenchPath&quot; isn&apos;t set in /Users/Developer/.run-jsc-benchmarks
7572/7572                                                                                           
Generating benchmark report at /Users/Developer/Projects/Webkit2/Fix_BeforeFix_SunSpiderLongSpiderV8SpiderOctaneKrakenJSRegress_MacBook-Pro-Skachkov-2_20151105_2205_report.txt
And raw data at /Users/Developer/Projects/Webkit2/Fix_BeforeFix_SunSpiderLongSpiderV8SpiderOctaneKrakenJSRegress_MacBook-Pro-Skachkov-2_20151105_2205.json

Benchmark report for SunSpider, LongSpider, V8Spider, Octane, Kraken, and JSRegress on MacBook-Pro-Skachkov-2 (MacBookPro8,1).

VMs tested:
&quot;Fix&quot; at /Users/Developer/Projects/Webkit2/WebKitBuild/dfg_fix/Release/jsc
&quot;BeforeFix&quot; at /Users/Developer/Projects/Webkit2/WebKitBuild/before_dfg_fix/Release/jsc

Collected 8 samples per benchmark/VM, with 8 VM invocations per benchmark. Ran 4 benchmark iterations, and measured the total
time of those iterations, for each sample. Emitted a call to gc() between sample measurements. Used 4 benchmark iterations per
VM invocation for warm-up. Used the jsc-specific preciseTime() function to get microsecond-level timing. Reporting benchmark
execution times with 95% confidence intervals in milliseconds.

                                                           Fix                    BeforeFix                                     
SunSpider:
   3d-cube                                           60.3279+-5.2532           59.1193+-4.6053          might be 1.0204x faster
   3d-morph                                          43.8007+-2.4074           42.3849+-1.4340          might be 1.0334x faster
   3d-raytrace                                       66.8714+-2.0836           64.3316+-2.6115          might be 1.0395x faster
   access-binary-trees                               26.7815+-2.0608     ?     27.0952+-2.6674        ? might be 1.0117x slower
   access-fannkuch                                   75.8468+-6.0539     ?     78.8735+-8.9021        ? might be 1.0399x slower
   access-nbody                                      20.8954+-2.0391           19.9958+-2.4055          might be 1.0450x faster
   access-nsieve                                     25.5906+-1.9051           23.6032+-0.9216          might be 1.0842x faster
   bitops-3bit-bits-in-byte                          14.4923+-1.4270           13.7523+-1.7114          might be 1.0538x faster
   bitops-bits-in-byte                               28.6466+-0.8659     ?     30.1053+-1.1481        ? might be 1.0509x slower
   bitops-bitwise-and                                13.2881+-1.1913     ?     13.5633+-1.8152        ? might be 1.0207x slower
   bitops-nsieve-bits                                30.4854+-1.6975     ?     32.5904+-3.5984        ? might be 1.0690x slower
   controlflow-recursive                             38.4021+-2.2201           35.9990+-2.0585          might be 1.0668x faster
   crypto-aes                                        29.5605+-2.5721           28.0310+-2.3639          might be 1.0546x faster
   crypto-md5                                        29.1330+-2.4557           28.0482+-4.0846          might be 1.0387x faster
   crypto-sha1                                       33.5098+-3.4726           33.4431+-2.0538        
   date-format-tofte                                 66.3344+-5.7434     ?     68.3076+-8.6735        ? might be 1.0297x slower
   date-format-xparb                                 37.5168+-1.8415           35.5577+-1.2986          might be 1.0551x faster
   math-cordic                                       29.1978+-3.4406           29.0242+-1.2601        
   math-partial-sums                                 32.9702+-3.0456           31.2031+-0.8265          might be 1.0566x faster
   math-spectral-norm                                19.3752+-0.9704     ?     19.3848+-1.1664        ?
   regexp-dna                                        39.2908+-2.8728           38.0215+-2.5909          might be 1.0334x faster
   string-base64                                     28.9547+-2.0301           28.3639+-2.3567          might be 1.0208x faster
   string-fasta                                      63.1025+-1.9794     ?     64.3282+-3.0530        ? might be 1.0194x slower
   string-tagcloud                                   51.1174+-2.2045     ?     51.4809+-3.2447        ?
   string-unpack-code                               118.5112+-3.8094          117.5229+-5.0168        
   string-validate-input                             38.3825+-2.4444     ?     38.7733+-2.1789        ? might be 1.0102x slower

   &lt;arithmetic&gt;                                      40.8610+-0.8655           40.4963+-0.9666          might be 1.0090x faster

                                                           Fix                    BeforeFix                                     
LongSpider:
   3d-cube                                         4936.9534+-42.2698    ?   4955.0228+-43.6803       ?
   3d-morph                                        7953.8007+-43.5699    ?   7964.1966+-34.1599       ?
   3d-raytrace                                     3985.0371+-43.8246        3965.7482+-45.5494       
   access-binary-trees                             5551.9198+-55.7057    ?   5560.9614+-64.0171       ?
   access-fannkuch                                 2031.7034+-84.1365    ?   2059.7932+-37.7003       ? might be 1.0138x slower
   access-nbody                                    3257.6769+-21.6954    ?   3297.8613+-23.2334       ? might be 1.0123x slower
   access-nsieve                                   2615.8301+-16.9671    ?   2618.7848+-22.4323       ?
   bitops-3bit-bits-in-byte                         237.6195+-6.4040          236.7867+-5.6776        
   bitops-bits-in-byte                              543.8614+-13.0341         533.1287+-4.9771          might be 1.0201x faster
   bitops-nsieve-bits                              2838.9832+-27.1735    ?   2871.9086+-50.7744       ? might be 1.0116x slower
   controlflow-recursive                           2631.6840+-31.7154        2616.8352+-22.8841       
   crypto-aes                                      3850.6544+-71.9108    ?   3870.1117+-61.8432       ?
   crypto-md5                                      3757.1407+-67.6617        3744.9117+-68.7314       
   crypto-sha1                                     4167.5549+-35.5560    ?   4172.8966+-36.5399       ?
   date-format-tofte                               4147.4077+-61.1932    ?   4157.3208+-75.3768       ?
   date-format-xparb                               4741.0953+-45.6068        4733.5782+-85.1889       
   hash-map                                        1123.0346+-21.3514        1092.6324+-25.8507         might be 1.0278x faster
   math-cordic                                     2956.7852+-33.3101        2939.4534+-28.4206       
   math-partial-sums                               3104.9084+-25.0187    ?   3135.9914+-38.6734       ? might be 1.0100x slower
   math-spectral-norm                              4581.1455+-37.6245    ?   4612.6143+-32.7220       ?
   string-base64                                   2549.6457+-196.9663   ?   2619.2205+-231.4725      ? might be 1.0273x slower
   string-fasta                                    2346.2110+-35.7030        2324.2865+-47.2201       
   string-tagcloud                                 1172.1411+-27.3103        1167.6298+-28.4972       

   &lt;geometric&gt;                                     2654.8870+-14.9014    ?   2656.2182+-11.3358       ? might be 1.0005x slower

                                                           Fix                    BeforeFix                                     
V8Spider:
   crypto                                           517.8475+-18.8099         510.7007+-16.3780         might be 1.0140x faster
   deltablue                                        889.7703+-37.4933    ?    904.7790+-51.6238       ? might be 1.0169x slower
   earley-boyer                                     407.4143+-15.7157         397.8115+-5.7550          might be 1.0241x faster
   raytrace                                         415.9429+-13.4797         410.8824+-11.3964         might be 1.0123x faster
   regexp                                           421.0417+-10.8461    ?    427.0253+-12.6022       ? might be 1.0142x slower
   richards                                         517.1673+-25.4907    ?    547.5957+-24.4090       ? might be 1.0588x slower
   splay                                            354.9477+-27.4169         354.6688+-18.1259       

   &lt;geometric&gt;                                      481.3396+-6.8028     ?    484.0639+-6.8536        ? might be 1.0057x slower

                                                           Fix                    BeforeFix                                     
Octane:
   encrypt                                           1.06643+-0.02291          1.04612+-0.01583         might be 1.0194x faster
   decrypt                                          19.26799+-0.26595    ?    19.66861+-0.56343       ? might be 1.0208x slower
   deltablue                                x2       0.91013+-0.02202          0.90852+-0.01952       
   earley                                            2.11263+-0.05547          2.08413+-0.06528         might be 1.0137x faster
   boyer                                            31.69638+-0.49096         31.07923+-0.59817         might be 1.0199x faster
   navier-stokes                            x2      26.84462+-0.30754    ?    27.05840+-0.59574       ?
   raytrace                                 x2       6.06020+-0.12159          6.01713+-0.09121       
   richards                                 x2       0.55841+-0.00593          0.55726+-0.01109       
   splay                                    x2       2.81455+-0.04842          2.80272+-0.06162       
   regexp                                   x2     161.52478+-2.11715    ?   163.12362+-1.49507       ?
   pdfjs                                    x2     274.99122+-5.03177        272.04259+-4.84588         might be 1.0108x faster
   mandreel                                 x2     327.85478+-15.92494   ?   337.35515+-13.23342      ? might be 1.0290x slower
   gbemu                                    x2     234.28212+-2.30233    ?   240.33261+-16.99028      ? might be 1.0258x slower
   closure                                           3.76215+-0.07044    ?     3.79839+-0.09748       ?
   jquery                                           51.29816+-0.88359    ?    51.54450+-0.87454       ?
   box2d                                    x2     100.16165+-2.26659         99.08167+-2.98488         might be 1.0109x faster
   zlib                                     x2    1509.03620+-45.37333      1501.50150+-28.35773      
   typescript                               x2    4187.14572+-85.42193      4161.01849+-55.46713      

   &lt;geometric&gt;                                      36.37072+-0.17739    ?    36.40112+-0.24677       ? might be 1.0008x slower

                                                           Fix                    BeforeFix                                     
Kraken:
   ai-astar                                          917.258+-34.338           917.165+-48.744        
   audio-beat-detection                              389.593+-11.142     ?     400.542+-15.671        ? might be 1.0281x slower
   audio-dft                                         621.324+-16.133           611.327+-18.355          might be 1.0164x faster
   audio-fft                                         293.147+-11.209     ?     293.449+-9.620         ?
   audio-oscillator                                  382.405+-3.766      ?     391.087+-17.010        ? might be 1.0227x slower
   imaging-darkroom                                  416.763+-4.547      ?     423.493+-11.296        ? might be 1.0161x slower
   imaging-desaturate                                407.154+-11.303           402.631+-9.128           might be 1.0112x faster
   imaging-gaussian-blur                             622.305+-26.275     ?     623.474+-23.470        ?
   json-parse-financial                              259.074+-5.208      ?     261.655+-6.587         ?
   json-stringify-tinderbox                          151.131+-2.473      ?     152.214+-3.300         ?
   stanford-crypto-aes                               317.395+-8.483      ?     332.680+-29.639        ? might be 1.0482x slower
   stanford-crypto-ccm                               306.418+-14.164           298.411+-17.445          might be 1.0268x faster
   stanford-crypto-pbkdf2                            597.750+-10.391     ?     613.064+-15.826        ? might be 1.0256x slower
   stanford-crypto-sha256-iterative                  239.186+-8.448            236.155+-7.224           might be 1.0128x faster

   &lt;arithmetic&gt;                                      422.922+-1.751      ?     425.525+-3.395         ? might be 1.0062x slower

                                                           Fix                    BeforeFix                                     
JSRegress:
   abc-forward-loop-equal                           248.3547+-11.8250         243.1334+-3.9644          might be 1.0215x faster
   abc-postfix-backward-loop                        246.1800+-8.0114          243.1070+-4.6267          might be 1.0126x faster
   abc-simple-backward-loop                         244.0085+-4.6571          242.2568+-8.3343        
   abc-simple-forward-loop                          242.2127+-4.8791     ?    243.1343+-5.8573        ?
   abc-skippy-loop                                  167.9513+-4.0436          167.5475+-2.9553        
   abs-boolean                                       22.8678+-0.5655     ?     23.0145+-1.1227        ?
   adapt-to-double-divide                            88.1037+-1.4453     ?     88.4425+-1.1883        ?
   aliased-arguments-getbyval                        15.1685+-1.6906           13.3485+-0.6205          might be 1.1363x faster
   allocate-big-object                               18.5541+-1.6145     ?     19.5961+-1.1519        ? might be 1.0562x slower
   arguments-named-and-reflective                    68.2729+-4.7680     ?     71.6875+-3.6158        ? might be 1.0500x slower
   arguments-out-of-bounds                           71.9801+-3.4379     ?     72.3934+-3.1280        ?
   arguments-strict-mode                             61.8747+-3.9827     ?     62.3142+-3.3367        ?
   arguments                                         54.1470+-3.4779     ?     57.9829+-2.4934        ? might be 1.0708x slower
   arity-mismatch-inlining                           10.8566+-1.8645           10.5703+-2.5897          might be 1.0271x faster
   array-access-polymorphic-structure                51.6237+-4.3574           49.5312+-3.8777          might be 1.0422x faster
   array-nonarray-polymorhpic-access                196.7447+-9.2106          186.2057+-6.4906          might be 1.0566x faster
   array-prototype-every                            474.7593+-13.5993    ?    477.1281+-9.1430        ?
   array-prototype-forEach                          478.3115+-40.5658         468.5193+-13.9095         might be 1.0209x faster
   array-prototype-map                              519.4578+-9.7583     ?    538.7429+-45.9244       ? might be 1.0371x slower
   array-prototype-reduce                           459.4300+-27.5618         450.3123+-7.7892          might be 1.0202x faster
   array-prototype-reduceRight                      509.1262+-22.7573         483.5309+-19.1673         might be 1.0529x faster
   array-prototype-some                             473.8173+-12.8060    ?    475.8639+-10.6899       ?
   array-splice-contiguous                          146.1763+-1.9852     ?    149.4180+-7.9055        ? might be 1.0222x slower
   array-with-double-add                             36.2357+-0.8732     ?     36.5052+-2.0035        ?
   array-with-double-increment                       27.9372+-1.5559     ?     29.3710+-3.2754        ? might be 1.0513x slower
   array-with-double-mul-add                         47.6523+-1.8973           45.0891+-2.1704          might be 1.0568x faster
   array-with-double-sum                             25.3787+-1.0872     ?     26.7085+-1.5638        ? might be 1.0524x slower
   array-with-int32-add-sub                          58.0536+-3.3569           57.1935+-4.4378          might be 1.0150x faster
   array-with-int32-or-double-sum                    27.9187+-0.6515           27.7355+-1.1347        
   ArrayBuffer-DataView-alloc-large-long-lived   
                                                    206.6901+-5.9877     ?    210.9046+-8.8285        ? might be 1.0204x slower
   ArrayBuffer-DataView-alloc-long-lived             99.4792+-2.6241           98.1825+-2.8404          might be 1.0132x faster
   ArrayBuffer-Int32Array-byteOffset                 23.4693+-1.4518     ?     24.7513+-2.7216        ? might be 1.0546x slower
   ArrayBuffer-Int8Array-alloc-large-long-lived   
                                                    217.6071+-4.2521          214.0616+-5.9209          might be 1.0166x faster
   ArrayBuffer-Int8Array-alloc-long-lived-buffer   
                                                    166.8110+-6.4926          163.8646+-8.3990          might be 1.0180x faster
   ArrayBuffer-Int8Array-alloc-long-lived            96.6720+-5.1920           92.5998+-2.9617          might be 1.0440x faster
   ArrayBuffer-Int8Array-alloc                       85.6750+-5.5610     ?     87.5450+-11.2087       ? might be 1.0218x slower
   arrowfunction-call                                76.0423+-1.3269     ?     77.4137+-3.0662        ? might be 1.0180x slower
   asmjs_bool_bug                                    51.8867+-3.1601     ?     54.3750+-5.5241        ? might be 1.0480x slower
   assign-custom-setter-polymorphic                  16.7898+-0.7530     ?     17.5807+-2.4106        ? might be 1.0471x slower
   assign-custom-setter                              24.0979+-1.4413     ?     24.3891+-1.5503        ? might be 1.0121x slower
   basic-set                                         60.3833+-4.7223     ?     60.5856+-5.3263        ?
   big-int-mul                                       31.2197+-2.6968     ?     32.4763+-1.5325        ? might be 1.0403x slower
   boolean-test                                      20.1479+-0.3327     ?     20.7159+-0.6992        ? might be 1.0282x slower
   branch-fold                                       39.6016+-2.0427     ?     40.8057+-2.1867        ? might be 1.0304x slower
   branch-on-string-as-boolean                      107.8884+-3.7585          106.1672+-3.3058          might be 1.0162x faster
   by-val-generic                                    19.4797+-1.5766     ?     20.0226+-0.7894        ? might be 1.0279x slower
   call-spread-apply                                228.3672+-13.3322    ?    234.9973+-12.3210       ? might be 1.0290x slower
   call-spread-call                                 168.4126+-8.5412          166.8345+-8.1874        
   captured-assignments                               3.3037+-0.5848     ?      3.9162+-0.3297        ? might be 1.1854x slower
   cast-int-to-double                                33.5422+-1.0804     ?     34.8210+-1.2540        ? might be 1.0381x slower
   cell-argument                                     37.8520+-0.9904     ?     38.9023+-2.8185        ? might be 1.0277x slower
   cfg-simplify                                      19.9194+-0.5006     ?     20.3031+-1.1597        ? might be 1.0193x slower
   chain-getter-access                               59.0440+-3.7944           58.1888+-3.0709          might be 1.0147x faster
   cmpeq-obj-to-obj-other                            80.0070+-3.1839           79.4862+-2.1357        
   constant-test                                     29.4543+-0.5831     ?     30.2509+-0.8742        ? might be 1.0270x slower
   create-lots-of-functions                          66.2056+-5.8501           64.1871+-1.7751          might be 1.0314x faster
   cse-new-array-buffer                              19.8762+-0.6097           19.3772+-0.8860          might be 1.0258x faster
   cse-new-array                                     21.2814+-0.8619           21.2569+-0.9973        
   custom-setter-getter-as-put-get-by-id              3.7253+-0.5935     ?      4.0805+-0.6244        ? might be 1.0954x slower
   DataView-custom-properties                       242.5149+-5.1200     ?    243.3315+-7.2272        ?
   delay-tear-off-arguments-strictmode               97.3021+-9.8092           91.9093+-6.7803          might be 1.0587x faster
   deltablue-varargs                               1529.2698+-29.0977        1506.1654+-22.1304         might be 1.0153x faster
   destructuring-arguments                         1079.8660+-20.4854    ?   1089.6494+-28.5104       ?
   destructuring-parameters-overridden-by-function   
                                                      3.5096+-0.5492            3.4616+-0.4624          might be 1.0139x faster
   destructuring-swap                                33.6896+-2.8514           31.9637+-3.3813          might be 1.0540x faster
   direct-arguments-getbyval                         13.8395+-1.3133           13.0507+-0.8767          might be 1.0604x faster
   div-boolean-double                                28.2201+-0.3969     ?     28.6958+-0.3240        ? might be 1.0169x slower
   div-boolean                                       41.4660+-1.0170     ?     42.0199+-1.3554        ? might be 1.0134x slower
   double-get-by-val-out-of-bounds                   30.7199+-2.9259           30.0472+-3.1970          might be 1.0224x faster
   double-pollution-getbyval                         46.6652+-0.3662           46.3763+-0.3410        
   double-pollution-putbyoffset                      24.8600+-1.3004     ?     24.8626+-4.7538        ?
   double-real-use                                  163.5290+-11.8867         161.3741+-8.1117          might be 1.0134x faster
   double-to-int32-typed-array-no-inline             28.6189+-1.8760           28.0342+-1.5075          might be 1.0209x faster
   double-to-int32-typed-array                       20.5589+-1.3934     ?     21.4498+-1.9905        ? might be 1.0433x slower
   double-to-uint32-typed-array-no-inline            30.9026+-2.5728           30.2519+-0.9966          might be 1.0215x faster
   double-to-uint32-typed-array                      22.5652+-1.9058           21.0390+-0.9283          might be 1.0725x faster
   elidable-new-object-dag                          252.7990+-9.1641          243.7296+-8.3377          might be 1.0372x faster
   elidable-new-object-roflcopter                   218.5367+-4.1005     ?    220.7202+-11.9423       ?
   elidable-new-object-then-call                    237.9029+-3.6266          233.7087+-10.0059         might be 1.0179x faster
   elidable-new-object-tree                         269.3029+-6.3054     ?    270.1916+-11.0806       ?
   empty-string-plus-int                             35.6049+-2.1580           33.4929+-1.5954          might be 1.0631x faster
   emscripten-cube2hash                             272.6950+-6.2258     ?    276.9236+-16.1087       ? might be 1.0155x slower
   exit-length-on-plain-object                       94.0552+-3.4320           93.5144+-2.2441        
   external-arguments-getbyval                       17.6419+-0.9070     ?     18.0192+-1.0966        ? might be 1.0214x slower
   external-arguments-putbyval                       25.1720+-0.8427     ?     27.7577+-3.6395        ? might be 1.1027x slower
   fixed-typed-array-storage-var-index               14.2697+-1.5833           13.8413+-2.4228          might be 1.0310x faster
   fixed-typed-array-storage                         10.2910+-1.0502     ?     11.3608+-1.0822        ? might be 1.1040x slower
   Float32Array-matrix-mult                          27.0676+-0.5071     ?     30.6939+-6.7689        ? might be 1.1340x slower
   Float32Array-to-Float64Array-set                 310.1675+-13.1513         307.3061+-6.6665        
   Float64Array-alloc-long-lived                    496.4288+-7.0654          489.8095+-5.0550          might be 1.0135x faster
   Float64Array-to-Int16Array-set                   372.3265+-11.0429    ?    391.2651+-41.7865       ? might be 1.0509x slower
   fold-double-to-int                                89.6517+-7.4943     ?     89.9210+-5.6521        ?
   fold-get-by-id-to-multi-get-by-offset-rare-int   
                                                     80.8470+-5.3045           80.8130+-3.1756        
   fold-get-by-id-to-multi-get-by-offset             69.7762+-2.0567     ?     69.8798+-1.5904        ?
   fold-multi-get-by-offset-to-get-by-offset   
                                                     64.6475+-2.5669           62.7396+-2.8776          might be 1.0304x faster
   fold-multi-get-by-offset-to-poly-get-by-offset   
                                                     69.2465+-4.8206           66.8054+-3.9023          might be 1.0365x faster
   fold-multi-put-by-offset-to-poly-put-by-offset   
                                                     75.2249+-3.8481     ?     75.7490+-5.6023        ?
   fold-multi-put-by-offset-to-put-by-offset   
                                                     72.4652+-5.1430           66.0322+-5.9772          might be 1.0974x faster
   fold-multi-put-by-offset-to-replace-or-transition-put-by-offset   
                                                     88.2826+-6.8597     ?     91.2180+-4.2326        ? might be 1.0332x slower
   fold-put-by-id-to-multi-put-by-offset             81.5416+-1.8387           80.3013+-2.4617          might be 1.0154x faster
   fold-put-by-val-with-string-to-multi-put-by-offset   
                                                     80.5768+-2.2859           77.9179+-3.8368          might be 1.0341x faster
   fold-put-by-val-with-symbol-to-multi-put-by-offset   
                                                     80.6056+-1.9483     ?     82.6725+-3.1537        ? might be 1.0256x slower
   fold-put-structure                                55.4818+-2.4504           55.2573+-4.5552        
   for-of-iterate-array-entries                      81.3887+-6.8297     ?     83.1516+-6.6863        ? might be 1.0217x slower
   for-of-iterate-array-keys                         34.0285+-3.0841           32.6400+-1.0607          might be 1.0425x faster
   for-of-iterate-array-values                       34.7778+-4.5627           33.3632+-1.6340          might be 1.0424x faster
   fround                                            97.9710+-3.1966     ?     98.8747+-2.3054        ?
   ftl-library-inlining-dataview                    386.9449+-12.2903         385.8836+-12.1005       
   ftl-library-inlining                             658.0836+-8.4589          657.9121+-9.2447        
   ftl-object-sub                                  1940.6414+-16.7151    ?   1943.4342+-27.3714       ?
   function-call                                     79.2921+-1.8089           78.2475+-2.0669          might be 1.0133x faster
   function-dot-apply                                18.5085+-1.1856           18.0880+-1.0608          might be 1.0232x faster
   function-test                                     20.4301+-0.6596     ?     21.8943+-1.7218        ? might be 1.0717x slower
   function-with-eval                               571.6324+-14.1836    ?    579.3211+-19.8840       ? might be 1.0135x slower
   gcse-poly-get-less-obvious                       153.6821+-6.9120          151.3678+-3.8002          might be 1.0153x faster
   gcse-poly-get                                    153.0598+-2.9111     ?    153.8516+-4.1257        ?
   gcse                                              31.4513+-2.6384           30.4837+-1.4886          might be 1.0317x faster
   get-by-id-bimorphic-check-structure-elimination-simple   
                                                     23.4345+-3.8950           21.0181+-2.0449          might be 1.1150x faster
   get-by-id-bimorphic-check-structure-elimination   
                                                     41.2886+-0.9385           41.2861+-1.3484        
   get-by-id-chain-from-try-block                    15.0194+-0.7142           14.9966+-0.5385        
   get-by-id-check-structure-elimination             30.4046+-2.3189     ?     31.5512+-1.9463        ? might be 1.0377x slower
   get-by-id-proto-or-self                          111.1536+-5.8157     ?    113.7448+-12.3615       ? might be 1.0233x slower
   get-by-id-quadmorphic-check-structure-elimination-simple   
                                                     25.3158+-1.4461     ?     25.6265+-1.5342        ? might be 1.0123x slower
   get-by-id-self-or-proto                          115.8764+-12.6263    ?    117.5045+-16.1148       ? might be 1.0141x slower
   get-by-val-out-of-bounds                          31.9862+-3.7469           29.3296+-2.2178          might be 1.0906x faster
   get-by-val-with-string-bimorphic-check-structure-elimination-simple   
                                                     25.4583+-3.0973           25.4190+-1.9566        
   get-by-val-with-string-bimorphic-check-structure-elimination   
                                                     61.7146+-2.1415     ?     64.1429+-6.3696        ? might be 1.0393x slower
   get-by-val-with-string-chain-from-try-block   
                                                     15.3152+-0.7746           15.1277+-0.2966          might be 1.0124x faster
   get-by-val-with-string-check-structure-elimination   
                                                     51.9030+-1.4397     ?     52.1370+-1.7423        ?
   get-by-val-with-string-proto-or-self             125.1975+-9.3368          118.2734+-10.0015         might be 1.0585x faster
   get-by-val-with-string-quadmorphic-check-structure-elimination-simple   
                                                     32.1366+-1.2193     ?     35.0125+-4.5525        ? might be 1.0895x slower
   get-by-val-with-string-self-or-proto             116.7083+-5.1996     ?    116.8854+-14.3928       ?
   get-by-val-with-symbol-bimorphic-check-structure-elimination-simple   
                                                     32.1347+-3.0090           30.0809+-1.9466          might be 1.0683x faster
   get-by-val-with-symbol-bimorphic-check-structure-elimination   
                                                    120.3906+-11.0537         117.3497+-2.2127          might be 1.0259x faster
   get-by-val-with-symbol-chain-from-try-block   
                                                     15.2810+-0.7434           14.8809+-0.2018          might be 1.0269x faster
   get-by-val-with-symbol-check-structure-elimination   
                                                    102.9545+-2.7765          101.7386+-2.4803          might be 1.0120x faster
   get-by-val-with-symbol-proto-or-self             117.4892+-3.2699     ?    118.0263+-4.9909        ?
   get-by-val-with-symbol-quadmorphic-check-structure-elimination-simple   
                                                     39.9579+-2.5855           37.6209+-1.8585          might be 1.0621x faster
   get-by-val-with-symbol-self-or-proto             123.5155+-5.0466     ?    127.8084+-12.5512       ? might be 1.0348x slower
   get_callee_monomorphic                            22.8955+-1.1601           21.8961+-0.8305          might be 1.0456x faster
   get_callee_polymorphic                            22.5811+-2.6543           22.1932+-1.6230          might be 1.0175x faster
   getter-no-activation                              32.2466+-0.6583     ?     32.4869+-0.5105        ?
   getter-prototype                                  62.9038+-1.3070     ?     63.1887+-1.8431        ?
   getter-richards-try-catch                       7439.2906+-100.2175   ?   7561.9803+-135.7924      ? might be 1.0165x slower
   getter-richards                                 1034.5029+-27.3592    ?   1040.0813+-26.6802       ?
   getter                                            41.1127+-2.7953           39.6100+-1.2016          might be 1.0379x faster
   global-object-access-with-mutating-structure   
                                                     40.1761+-6.1580           38.7239+-4.4406          might be 1.0375x faster
   global-var-const-infer-fire-from-opt               5.8555+-1.2578            5.3885+-1.0119          might be 1.0867x faster
   global-var-const-infer                             4.8159+-0.6612            4.7100+-0.6866          might be 1.0225x faster
   hard-overflow-check-equal                        197.4247+-2.9028     ?    201.9360+-7.6058        ? might be 1.0229x slower
   hard-overflow-check                              197.0093+-5.2921          195.8808+-1.6683        
   HashMap-put-get-iterate-keys                     242.5242+-7.2437          234.1064+-9.8574          might be 1.0360x faster
   HashMap-put-get-iterate                          245.9733+-11.0033    ?    251.1104+-10.1797       ? might be 1.0209x slower
   HashMap-string-put-get-iterate                   262.4806+-17.0988         255.0180+-4.7993          might be 1.0293x faster
   hoist-make-rope                                   61.3640+-2.0564     ?     62.1887+-3.6646        ? might be 1.0134x slower
   hoist-poly-check-structure-effectful-loop   
                                                     33.2069+-1.9901           32.9044+-1.5906        
   hoist-poly-check-structure                        23.9777+-1.3177     ?     24.6169+-0.8462        ? might be 1.0267x slower
   imul-double-only                                  46.4455+-3.2123     ?     47.9195+-3.5234        ? might be 1.0317x slower
   imul-int-only                                     46.7033+-2.4373     ?     49.0479+-2.5110        ? might be 1.0502x slower
   imul-mixed                                        44.1217+-3.0165     ?     46.4489+-4.0805        ? might be 1.0527x slower
   in-four-cases                                    132.3111+-1.3645     ?    139.3483+-8.4667        ? might be 1.0532x slower
   in-one-case-false                                 87.1871+-3.9024     ?     90.8621+-3.0009        ? might be 1.0422x slower
   in-one-case-true                                  91.9971+-5.8642           91.2800+-8.2798        
   in-two-cases                                      94.1604+-6.4886           91.7974+-4.3742          might be 1.0257x faster
   indexed-properties-in-objects                     23.5090+-1.0266           23.1531+-1.0079          might be 1.0154x faster
   infer-closure-const-then-mov-no-inline            39.5889+-4.1582           37.4361+-1.4586          might be 1.0575x faster
   infer-closure-const-then-mov                     108.3543+-2.7836          105.1573+-2.3373          might be 1.0304x faster
   infer-closure-const-then-put-to-scope-no-inline   
                                                     73.8618+-4.1594           72.5915+-3.5290          might be 1.0175x faster
   infer-closure-const-then-put-to-scope            122.2302+-3.1486     ?    126.8000+-5.3187        ? might be 1.0374x slower
   infer-closure-const-then-reenter-no-inline   
                                                    303.7436+-24.8030         293.2769+-4.8959          might be 1.0357x faster
   infer-closure-const-then-reenter                 127.6003+-4.5925     ?    130.1367+-10.6536       ? might be 1.0199x slower
   infer-constant-global-property                    21.2719+-0.2141           20.9713+-0.4650          might be 1.0143x faster
   infer-constant-property                           20.5729+-2.1643           19.1651+-0.6576          might be 1.0735x faster
   infer-one-time-closure-ten-vars                   58.0474+-3.4145           57.6999+-4.1631        
   infer-one-time-closure-two-vars                   53.9786+-1.8947     ?     55.5354+-1.6895        ? might be 1.0288x slower
   infer-one-time-closure                            54.0497+-2.6889     ?     55.7831+-4.3760        ? might be 1.0321x slower
   infer-one-time-deep-closure                       86.2099+-3.8143     ?     88.6582+-7.0511        ? might be 1.0284x slower
   inline-arguments-access                           28.2180+-2.0329     ?     28.5418+-1.2325        ? might be 1.0115x slower
   inline-arguments-aliased-access                   28.8702+-0.7018           27.6418+-0.9835          might be 1.0444x faster
   inline-arguments-local-escape                     28.6228+-1.6619     ?     29.0631+-1.5065        ? might be 1.0154x slower
   inline-get-scoped-var                             30.6546+-0.3998           30.3474+-0.3003          might be 1.0101x faster
   inlined-put-by-id-transition                      70.8786+-4.7837           70.7156+-2.7142        
   inlined-put-by-val-with-string-transition   
                                                    288.6105+-6.5557          283.0253+-9.5009          might be 1.0197x faster
   inlined-put-by-val-with-symbol-transition   
                                                    285.5282+-4.9751     ?    288.0415+-7.3454        ?
   int-or-other-abs-then-get-by-val                  35.8548+-2.2182           33.3100+-2.2294          might be 1.0764x faster
   int-or-other-abs-zero-then-get-by-val            113.1167+-4.2468          108.3478+-6.3169          might be 1.0440x faster
   int-or-other-add-then-get-by-val                  31.5777+-3.2311     ?     35.4733+-3.7839        ? might be 1.1234x slower
   int-or-other-add                                  32.9695+-2.8993     ?     35.3986+-4.5898        ? might be 1.0737x slower
   int-or-other-div-then-get-by-val                  29.8175+-2.0949           28.8421+-0.9899          might be 1.0338x faster
   int-or-other-max-then-get-by-val                  30.1508+-2.9399     ?     31.5998+-1.7841        ? might be 1.0481x slower
   int-or-other-min-then-get-by-val                  33.0020+-3.2732           31.3052+-3.4360          might be 1.0542x faster
   int-or-other-mod-then-get-by-val                  26.7600+-1.2373     ?     27.4178+-2.1078        ? might be 1.0246x slower
   int-or-other-mul-then-get-by-val                  27.8539+-1.7683     ?     28.2698+-1.5700        ? might be 1.0149x slower
   int-or-other-neg-then-get-by-val                  32.0579+-2.6089           30.3278+-3.0388          might be 1.0570x faster
   int-or-other-neg-zero-then-get-by-val            105.6652+-6.4521          103.6017+-4.2521          might be 1.0199x faster
   int-or-other-sub-then-get-by-val                  33.6273+-4.3091     ?     35.0634+-4.3363        ? might be 1.0427x slower
   int-or-other-sub                                  28.8936+-3.5562           28.3027+-2.8231          might be 1.0209x faster
   int-overflow-local                                36.0428+-3.3607           34.9950+-1.4187          might be 1.0299x faster
   Int16Array-alloc-long-lived                      414.0408+-5.1609          412.9801+-10.8979       
   Int16Array-bubble-sort-with-byteLength           140.3655+-4.3537     ?    142.8105+-6.2125        ? might be 1.0174x slower
   Int16Array-bubble-sort                           139.2645+-2.1049     ?    144.1495+-9.0071        ? might be 1.0351x slower
   Int16Array-load-int-mul                           16.9655+-2.3887     ?     20.3563+-1.2355        ? might be 1.1999x slower
   Int16Array-to-Int32Array-set                     293.7810+-19.2267    ?    294.7234+-17.3502       ?
   Int32Array-alloc-large                           118.1516+-3.0678     ?    118.9050+-2.4182        ?
   Int32Array-alloc-long-lived                      434.9179+-10.5194         428.1853+-9.4269          might be 1.0157x faster
   Int32Array-alloc                                  21.1794+-1.1853     ?     22.5009+-2.2815        ? might be 1.0624x slower
   Int32Array-Int8Array-view-alloc                   40.5848+-2.7575     ?     41.8548+-4.5808        ? might be 1.0313x slower
   int52-spill                                       39.9429+-3.8723     ?     43.5003+-4.4078        ? might be 1.0891x slower
   Int8Array-alloc-long-lived                       361.2815+-15.9496         355.7922+-16.3056         might be 1.0154x faster
   Int8Array-load-with-byteLength                    24.7728+-2.1406           24.0679+-0.7930          might be 1.0293x faster
   Int8Array-load                                    24.9539+-1.6313           23.9702+-1.5853          might be 1.0410x faster
   integer-divide                                    75.4961+-3.6220           74.8463+-1.9660        
   integer-modulo                                    21.4453+-1.3348           19.7616+-1.0856          might be 1.0852x faster
   is-boolean-fold-tricky                            27.5968+-2.8911     ?     27.9692+-3.9923        ? might be 1.0135x slower
   is-boolean-fold                                   20.8186+-0.7146     ?     20.9853+-0.8507        ?
   is-function-fold-tricky-internal-function   
                                                     80.5955+-15.3388          73.8285+-6.7594          might be 1.0917x faster
   is-function-fold-tricky                           28.4310+-3.1548           27.9651+-3.2320          might be 1.0167x faster
   is-function-fold                                  21.5049+-0.6110           20.6832+-1.0722          might be 1.0397x faster
   is-number-fold-tricky                             30.3958+-3.0912           29.8339+-3.7573          might be 1.0188x faster
   is-number-fold                                    20.9139+-1.0185     ?     21.4782+-0.2281        ? might be 1.0270x slower
   is-object-or-null-fold-functions                  21.2103+-0.7097     ?     21.2178+-0.9225        ?
   is-object-or-null-fold-less-tricky                27.7766+-2.7556     ?     29.2303+-2.5157        ? might be 1.0523x slower
   is-object-or-null-fold-tricky                     36.3703+-5.0491     ?     38.4519+-5.0161        ? might be 1.0572x slower
   is-object-or-null-fold                            21.5919+-0.6342           20.8412+-0.9444          might be 1.0360x faster
   is-object-or-null-trickier-function               30.9670+-0.9129           29.5915+-2.1123          might be 1.0465x faster
   is-object-or-null-trickier-internal-function   
                                                     76.1633+-6.8044     ?     76.2104+-8.8930        ?
   is-object-or-null-tricky-function                 29.9841+-2.1435     ?     30.1091+-2.2392        ?
   is-object-or-null-tricky-internal-function   
                                                     52.4604+-3.8272     ?     53.0280+-4.4840        ? might be 1.0108x slower
   is-string-fold-tricky                             28.6809+-2.9507           27.6410+-3.1509          might be 1.0376x faster
   is-string-fold                                    21.1254+-1.3133           20.9288+-0.6921        
   is-undefined-fold-tricky                          27.6399+-3.6503           26.7113+-0.6298          might be 1.0348x faster
   is-undefined-fold                                 21.2455+-0.7474           20.7764+-0.9585          might be 1.0226x faster
   JSONP-negative-0                                   1.7598+-0.4557            1.4644+-0.0510          might be 1.2017x faster
   large-int-captured                                31.5883+-1.1263           31.1993+-2.0704          might be 1.0125x faster
   large-int-neg                                     90.8738+-7.5658           88.0585+-3.7051          might be 1.0320x faster
   large-int                                         82.2344+-5.9553     ?     84.8481+-7.5053        ? might be 1.0318x slower
   load-varargs-elimination                         128.6814+-3.6905     ?    130.3015+-5.7107        ? might be 1.0126x slower
   logical-not-weird-types                           24.9646+-1.1368     ?     25.0066+-1.7074        ?
   logical-not                                       32.3065+-4.0140           31.0624+-5.6206          might be 1.0401x faster
   lots-of-fields                                    77.6734+-5.7490     ?     81.4124+-8.6141        ? might be 1.0481x slower
   make-indexed-storage                              26.4108+-0.5891           26.3351+-0.7573        
   make-rope-cse                                     63.7290+-23.3034          63.2879+-24.1401       
   marsaglia-larger-ints                            231.5888+-3.7372     ?    235.4858+-8.0286        ? might be 1.0168x slower
   marsaglia-osr-entry                              131.7492+-5.3470     ?    140.9822+-10.6871       ? might be 1.0701x slower
   math-with-out-of-bounds-array-values             138.0207+-7.4522     ?    143.7501+-14.7076       ? might be 1.0415x slower
   max-boolean                                       21.1494+-0.9057           20.6707+-1.0428          might be 1.0232x faster
   method-on-number                                  96.9545+-3.9263     ?     99.5086+-5.6049        ? might be 1.0263x slower
   min-boolean                                       20.3871+-0.7161     ?     20.9946+-0.6947        ? might be 1.0298x slower
   minus-boolean-double                              20.2047+-0.3411           20.1639+-0.6771        
   minus-boolean                                     19.2968+-1.1815           19.1006+-0.6501          might be 1.0103x faster
   misc-strict-eq                                   192.7561+-11.0636    ?    194.6218+-5.3801        ?
   mod-boolean-double                                63.7414+-3.1473           63.6026+-1.9772        
   mod-boolean                                       43.0380+-0.8316     ?     43.7653+-1.5681        ? might be 1.0169x slower
   mul-boolean-double                                22.1679+-0.6482           21.5932+-0.4637          might be 1.0266x faster
   mul-boolean                                       19.9781+-0.8473           19.8300+-0.5968        
   neg-boolean                                       22.2106+-1.2857           21.8952+-0.5372          might be 1.0144x faster
   negative-zero-divide                               2.5881+-0.3479     ?      2.8442+-0.4786        ? might be 1.0990x slower
   negative-zero-modulo                               2.9882+-0.5584            2.8665+-0.4348          might be 1.0424x faster
   negative-zero-negate                               3.0559+-0.4976            2.8812+-0.7461          might be 1.0606x faster
   nested-function-parsing                          254.9090+-3.2695          253.6252+-7.9046        
   new-array-buffer-dead                            570.0752+-8.5637     ?    572.4095+-11.9470       ?
   new-array-buffer-push                             81.3050+-2.2111     ?     85.5316+-6.2747        ? might be 1.0520x slower
   new-array-dead                                   110.5699+-3.6611          107.8911+-4.5895          might be 1.0248x faster
   new-array-push                                    32.3671+-1.9030     ?     32.4062+-1.3898        ?
   no-inline-constructor                            234.5881+-5.8258          227.2654+-6.9313          might be 1.0322x faster
   number-test                                       20.7652+-0.7566           20.5342+-0.7042          might be 1.0112x faster
   object-closure-call                               39.0291+-2.9705           37.6329+-3.7276          might be 1.0371x faster
   object-get-own-property-symbols-on-large-array   
                                                     25.6381+-1.7280     ?     28.9028+-2.1589        ? might be 1.1273x slower
   object-test                                       20.9040+-1.7052     ?     21.3716+-1.6827        ? might be 1.0224x slower
   obvious-sink-pathology-taken                     698.2741+-10.4222         698.1639+-13.2716       
   obvious-sink-pathology                           218.7240+-5.7427          215.5443+-8.0669          might be 1.0148x faster
   obviously-elidable-new-object                    208.5641+-5.4856          206.7479+-4.1272        
   plus-boolean-arith                                19.8546+-0.4223     ?     19.9548+-0.6123        ?
   plus-boolean-double                               21.5928+-2.4518           20.2342+-0.5601          might be 1.0671x faster
   plus-boolean                                      19.4352+-1.1187           18.6309+-0.6055          might be 1.0432x faster
   poly-chain-access-different-prototypes-simple   
                                                     23.2156+-1.6828     ?     24.3576+-1.4059        ? might be 1.0492x slower
   poly-chain-access-different-prototypes            20.3248+-1.2430     ?     20.8123+-1.0686        ? might be 1.0240x slower
   poly-chain-access-simpler                         22.8906+-1.4199     ?     24.1867+-2.6669        ? might be 1.0566x slower
   poly-chain-access                                 20.5511+-1.0672           20.2842+-1.2444          might be 1.0132x faster
   poly-stricteq                                    338.8976+-4.1419     ?    342.3390+-23.2289       ? might be 1.0102x slower
   polymorphic-array-call                            15.4984+-0.6771     ?     15.5124+-1.0716        ?
   polymorphic-get-by-id                             22.9206+-1.4691     ?     23.0477+-0.7007        ?
   polymorphic-put-by-id                            212.0586+-7.8434     ?    212.9590+-10.7822       ?
   polymorphic-put-by-val-with-string               216.8737+-11.3723         214.6953+-9.8213          might be 1.0101x faster
   polymorphic-put-by-val-with-symbol               208.0868+-0.8865     ?    212.2851+-6.7120        ? might be 1.0202x slower
   polymorphic-structure                             79.5648+-2.7442     ?     83.5221+-4.5936        ? might be 1.0497x slower
   polyvariant-monomorphic-get-by-id                 69.7090+-5.3605           66.6412+-1.5460          might be 1.0460x faster
   proto-getter-access                               60.9397+-4.5792           58.1961+-2.4087          might be 1.0471x faster
   prototype-access-with-mutating-prototype          38.3606+-4.8471           36.9279+-3.2655          might be 1.0388x faster
   put-by-id-replace-and-transition                  54.7204+-4.0735     ?     55.8335+-3.2174        ? might be 1.0203x slower
   put-by-id-slightly-polymorphic                    21.3425+-0.9432     ?     21.4415+-1.3311        ?
   put-by-id                                         77.3204+-3.5293           75.3388+-4.1252          might be 1.0263x faster
   put-by-val-direct                                  3.2748+-0.6193            2.8743+-0.5214          might be 1.1393x faster
   put-by-val-large-index-blank-indexing-type   
                                                     37.6198+-3.0133     ?     41.7556+-4.1608        ? might be 1.1099x slower
   put-by-val-machine-int                            22.4891+-0.7455     ?     22.8433+-0.5951        ? might be 1.0158x slower
   put-by-val-with-string-replace-and-transition   
                                                     72.4495+-3.4090           70.7083+-1.3172          might be 1.0246x faster
   put-by-val-with-string-slightly-polymorphic   
                                                     26.1489+-0.5987     ?     26.4767+-2.0976        ? might be 1.0125x slower
   put-by-val-with-string                            75.0376+-2.7471           73.4000+-2.3443          might be 1.0223x faster
   put-by-val-with-symbol-replace-and-transition   
                                                     76.7366+-1.9654           76.0969+-1.4409        
   put-by-val-with-symbol-slightly-polymorphic   
                                                     31.0532+-1.3520           30.3522+-1.0932          might be 1.0231x faster
   put-by-val-with-symbol                            73.9956+-2.0578     ?     74.4643+-2.0611        ?
   rare-osr-exit-on-local                            90.2668+-4.4570     ?     90.5140+-5.8072        ?
   raytrace-with-empty-try-catch                     45.8954+-6.5968           45.2542+-5.2048          might be 1.0142x faster
   raytrace-with-try-catch                           88.3881+-10.7426          87.9826+-3.2670        
   register-pressure-from-osr                       120.6426+-10.4559    ?    122.7211+-11.1620       ? might be 1.0172x slower
   repeat-multi-get-by-offset                       135.2970+-6.6761          132.5757+-8.3305          might be 1.0205x faster
   richards-empty-try-catch                         465.0954+-8.1787     ?    473.5721+-27.2325       ? might be 1.0182x slower
   richards-try-catch                              1520.9032+-13.6537        1511.0594+-26.5284       
   setter-prototype                                  53.0567+-2.3874           50.9932+-1.1531          might be 1.0405x faster
   setter                                            38.6514+-1.0862     !     49.8688+-1.2346        ! definitely 1.2902x slower
   simple-activation-demo                           147.5407+-6.6730     ?    157.4915+-9.8142        ? might be 1.0674x slower
   simple-getter-access                              74.9830+-3.1541           73.7732+-2.0431          might be 1.0164x faster
   simple-poly-call-nested                           55.8170+-2.1653           55.2667+-1.4896        
   simple-poly-call                                  16.5826+-1.2309     ?     16.8123+-1.6535        ? might be 1.0139x slower
   sin-boolean                                      108.2684+-8.0668          105.2971+-4.3302          might be 1.0282x faster
   singleton-scope                                  368.6896+-33.0565         358.7339+-7.4452          might be 1.0278x faster
   sink-function                                     63.1319+-4.9748           62.9786+-2.5910        
   sink-huge-activation                              96.5660+-3.9652     ?    103.7682+-3.7147        ? might be 1.0746x slower
   sinkable-new-object-dag                          387.7722+-7.8665     ?    387.8447+-12.5376       ?
   sinkable-new-object-taken                        302.9868+-10.4481         300.0339+-9.3971        
   sinkable-new-object                              212.8099+-9.8478     ?    214.3688+-6.8136        ?
   slow-array-profile-convergence                    18.0910+-0.8064     ?     18.5372+-1.6007        ? might be 1.0247x slower
   slow-convergence                                  17.7572+-1.5806     ?     20.0832+-1.7175        ? might be 1.1310x slower
   slow-ternaries                                   140.5127+-7.2927          135.0395+-3.2588          might be 1.0405x faster
   sorting-benchmark                                116.7383+-13.9113         110.2499+-1.5169          might be 1.0589x faster
   sparse-conditional                                12.4335+-1.1217     ?     13.2960+-2.2575        ? might be 1.0694x slower
   splice-to-remove                                  86.5713+-2.9699           85.1324+-2.0673          might be 1.0169x faster
   string-char-code-at                               97.8467+-6.3406     ?    103.4617+-7.9525        ? might be 1.0574x slower
   string-concat-object                              14.8041+-1.3678           14.3506+-1.1746          might be 1.0316x faster
   string-concat-pair-object                         14.1347+-1.1341           13.8463+-0.9804          might be 1.0208x faster
   string-concat-pair-simple                         73.2318+-3.2406     ?     74.7151+-3.2567        ? might be 1.0203x slower
   string-concat-simple                              77.2840+-4.0715     ?     77.7724+-6.0493        ?
   string-cons-repeat                                54.5978+-4.9403     ?     56.3950+-3.4749        ? might be 1.0329x slower
   string-cons-tower                                 54.8371+-3.4728           52.2709+-3.7407          might be 1.0491x faster
   string-equality                                  123.6823+-6.2875          119.8359+-12.1348         might be 1.0321x faster
   string-get-by-val-big-char                        48.6850+-3.4766           48.2600+-3.0194        
   string-get-by-val-out-of-bounds-insane            23.0407+-2.0489     ?     23.6817+-6.2195        ? might be 1.0278x slower
   string-get-by-val-out-of-bounds                   40.3425+-0.9776     ?     40.3758+-2.7637        ?
   string-get-by-val                                 27.6425+-2.9547           27.4706+-2.4720        
   string-hash                                       21.8142+-1.8052           20.3273+-0.8663          might be 1.0731x faster
   string-long-ident-equality                        99.2269+-7.0653     ?    101.6585+-8.7218        ? might be 1.0245x slower
   string-out-of-bounds                              75.4349+-3.1444     ?     78.4782+-7.1822        ? might be 1.0403x slower
   string-repeat-arith                              167.1833+-3.4738          165.3757+-1.8531          might be 1.0109x faster
   string-sub                                       225.8175+-4.6483          223.7131+-3.6372        
   string-test                                       20.3033+-0.4953     ?     20.6263+-1.2412        ? might be 1.0159x slower
   string-var-equality                              191.8360+-3.9785     ?    193.7697+-4.2185        ? might be 1.0101x slower
   structure-hoist-over-transitions                  19.5381+-0.7318           18.8941+-0.8062          might be 1.0341x faster
   substring-concat-weird                           246.4594+-3.5166     ?    252.1599+-6.9033        ? might be 1.0231x slower
   substring-concat                                 266.5085+-5.9785     ?    271.2991+-14.9789       ? might be 1.0180x slower
   substring                                        296.8947+-5.8104     ?    299.5863+-7.5064        ?
   switch-char-constant                              24.2994+-2.2307           22.8694+-0.7850          might be 1.0625x faster
   switch-char                                       49.8199+-2.5269           49.3379+-1.5740        
   switch-constant                                   51.7869+-2.7596     ?     52.4816+-1.6079        ? might be 1.0134x slower
   switch-string-basic-big-var                      122.0087+-11.4473    ?    130.5538+-13.0632       ? might be 1.0700x slower
   switch-string-basic-big                          122.0480+-14.4163         121.4859+-21.8805       
   switch-string-basic-var                          103.1384+-6.4397           93.5410+-4.9829          might be 1.1026x faster
   switch-string-basic                               96.0862+-7.4738     ?     96.2378+-13.6305       ?
   switch-string-big-length-tower-var               125.9320+-8.8751          119.9949+-8.9661          might be 1.0495x faster
   switch-string-length-tower-var                    98.4826+-4.4666           94.8630+-6.7352          might be 1.0382x faster
   switch-string-length-tower                        81.2186+-3.5539           80.6365+-4.9974        
   switch-string-short                               79.7038+-4.3658     ?     80.9059+-5.5167        ? might be 1.0151x slower
   switch                                            74.6167+-2.2768           72.2062+-2.7012          might be 1.0334x faster
   tear-off-arguments-simple                         25.4145+-2.0719           23.8238+-0.6953          might be 1.0668x faster
   tear-off-arguments                                30.1293+-1.2720     ?     30.4761+-0.8782        ? might be 1.0115x slower
   temporal-structure                                75.5294+-4.3503     ?     77.2843+-3.8437        ? might be 1.0232x slower
   to-int32-boolean                                  81.8837+-1.5243           81.8167+-3.2222        
   try-catch-get-by-val-cloned-arguments             68.8909+-3.6470           67.2928+-2.7079          might be 1.0237x faster
   try-catch-get-by-val-direct-arguments             14.1557+-0.5459     ?     14.3083+-0.7135        ? might be 1.0108x slower
   try-catch-get-by-val-scoped-arguments             29.6014+-1.6277           29.4226+-1.5063        
   typed-array-get-set-by-val-profiling             185.6413+-5.8530     ?    187.8572+-10.0398       ? might be 1.0119x slower
   undefined-property-access                       1920.5441+-18.4318    ?   1921.0068+-12.2927       ?
   undefined-test                                    20.9133+-0.6927           20.7510+-1.5002        
   unprofiled-licm                                   69.8514+-2.1820     ?     73.2597+-5.3848        ? might be 1.0488x slower
   v8-raytrace-with-empty-try-catch                 454.4405+-23.1414         450.8443+-23.1058       
   v8-raytrace-with-try-catch                       491.6582+-13.4017    ?    494.0941+-11.1226       ?
   varargs-call                                      92.0271+-4.1076     ?     92.8823+-4.0608        ?
   varargs-construct-inline                         152.2624+-5.7617          150.6516+-5.1035          might be 1.0107x faster
   varargs-construct                                133.3859+-8.6071          132.2691+-4.6177        
   varargs-inline                                    63.9172+-4.4543     ?     65.2684+-3.1963        ? might be 1.0211x slower
   varargs-strict-mode                               64.3584+-4.2519     ?     73.2272+-8.1800        ? might be 1.1378x slower
   varargs                                           68.2766+-9.2920           65.6472+-6.6378          might be 1.0401x faster
   weird-inlining-const-prop                         34.7619+-2.5935           34.3427+-5.9477          might be 1.0122x faster

   &lt;geometric&gt;                                       61.5038+-0.1595     ?     61.5067+-0.2936        ? might be 1.0000x slower

                                                           Fix                    BeforeFix                                     
Geomean of preferred means:
   &lt;scaled-result&gt;                                  191.5399+-0.8679     ?    191.6696+-0.7958        ? might be 1.0007x slower</thetext>
  </long_desc><long_desc isprivate="0" >
    <commentid>1139708</commentid>
    <comment_count>5</comment_count>
    <who name="Geoffrey Garen">ggaren</who>
    <bug_when>2015-11-05 12:24:48 -0800</bug_when>
    <thetext>Can you add a regression test to your patch? The project requires that each behavior change patch should include a regression test.</thetext>
  </long_desc><long_desc isprivate="0" >
    <commentid>1139725</commentid>
    <comment_count>6</comment_count>
    <who name="GSkachkov">gskachkov</who>
    <bug_when>2015-11-05 13:24:44 -0800</bug_when>
    <thetext>(In reply to comment #5)
&gt; Can you add a regression test to your patch? The project requires that each
&gt; behavior change patch should include a regression test.

I&apos;ve managed to reproduce it only in https://bugs.webkit.org/show_bug.cgi?id=149338 in one of the tests. 
Would it be OK to land 149338 patch with the commented failed test and then this patch with uncommented test?</thetext>
  </long_desc><long_desc isprivate="0" >
    <commentid>1139732</commentid>
    <comment_count>7</comment_count>
      <attachid>264868</attachid>
    <who name="Geoffrey Garen">ggaren</who>
    <bug_when>2015-11-05 13:34:05 -0800</bug_when>
    <thetext>Comment on attachment 264868
Patch

Yes, that&apos;s OK.

r=me</thetext>
  </long_desc><long_desc isprivate="0" >
    <commentid>1139755</commentid>
    <comment_count>8</comment_count>
      <attachid>264868</attachid>
    <who name="WebKit Commit Bot">commit-queue</who>
    <bug_when>2015-11-05 14:22:14 -0800</bug_when>
    <thetext>Comment on attachment 264868
Patch

Clearing flags on attachment: 264868

Committed r192078: &lt;http://trac.webkit.org/changeset/192078&gt;</thetext>
  </long_desc><long_desc isprivate="0" >
    <commentid>1139756</commentid>
    <comment_count>9</comment_count>
    <who name="WebKit Commit Bot">commit-queue</who>
    <bug_when>2015-11-05 14:22:20 -0800</bug_when>
    <thetext>All reviewed patches have been landed.  Closing bug.</thetext>
  </long_desc>
      
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          </attachment>
      

    </bug>

</bugzilla>