182165 2018-01-25 21:08:11 -0800 JavaScriptCore builtins should be partially minified in Release builds not Debug builds 2018-01-26 13:23:59 -0800 1 1 1 Unclassified WebKit JavaScriptCore WebKit Nightly Build Unspecified Unspecified RESOLVED FIXED InRadar P2 Normal --- 1 joepeck joepeck bburg commit-queue ews-watchlist jlewis3 joepeck keith_miller mark.lam msaboff saam webkit-bug-importer oldest_to_newest 1393425 0 joepeck 2018-01-25 21:08:11 -0800 JavaScriptCore builtins should be partially minified in Release builds not Debug builds Added with: <https://webkit.org/b/152290> Builtin source should be minified more http://trac.webkit.org/changeset/194144 > diff --git a/Source/JavaScriptCore/Scripts/builtins/builtins_model.py b/Source/JavaScriptCore/Scripts/builtins/builtins_model.py > old mode 100644 > new mode 100755 > index d765eca865e..cdd5f900354 > --- a/Source/JavaScriptCore/Scripts/builtins/builtins_model.py > +++ b/Source/JavaScriptCore/Scripts/builtins/builtins_model.py > @@ -100,6 +103,11 @@ class BuiltinFunction: > @staticmethod > def fromString(function_string): > function_source = multilineCommentRegExp.sub("", function_string) > + if os.getenv("CONFIGURATION", "Debug").startswith("Debug"): > + function_source = lineWithOnlySingleLineCommentRegExp.sub("", function_source) > + function_source = lineWithTrailingSingleLineCommentRegExp.sub("\n", function_source) > + function_source = multipleEmptyLinesRegExp.sub("\n", function_source) Should have been `if os.getenv("CONFIGURATION", "Debug").startswith("Debug"):` otherwise we are only doing these optimizations for Debug builds. 1393432 1 joepeck 2018-01-25 21:23:29 -0800 Example of the diff of a before/after the few minifications being applied: 534c463 < const int s_arrayPrototypeSomeCodeLength = 540; --- > const int s_arrayPrototypeSomeCodeLength = 460; 539,554c468,480 < " \"use strict\";\n" \ < "\n" \ < " var array = @toObject(this, \"Array.prototype.some requires that |this| not be null or undefined\");\n" \ < " var length = @toLength(array.length);\n" \ < "\n" \ < " if (typeof callback !== \"function\")\n" \ < " @throwTypeError(\"Array.prototype.some callback must be a function\");\n" \ < " \n" \ < " var thisArg = @argument(1);\n" \ < " for (var i = 0; i < length; i++) {\n" \ < " if (!(i in array))\n" \ < " continue;\n" \ < " if (callback.@call(thisArg, array[i], i, array))\n" \ < " return true;\n" \ < " }\n" \ < " return false;\n" \ --- > "\"use strict\";\n" \ > "var array = @toObject(this, \"Array.prototype.some requires that |this| not be null or undefined\");\n" \ > "var length = @toLength(array.length);\n" \ > "if (typeof callback !== \"function\")\n" \ > " @throwTypeError(\"Array.prototype.some callback must be a function\");\n" \ > "var thisArg = @argument(1);\n" \ > "for (var i = 0; i < length; i++) {\n" \ > " if (!(i in array))\n" \ > " continue;\n" \ > " if (callback.@call(thisArg, array[i], i, array))\n" \ > " return true;\n" \ > "}\n" \ > "return false;\n" \ Lets see what tests will be affected. 1393433 2 332350 joepeck 2018-01-25 21:25:25 -0800 Created attachment 332350 [PATCH] Proposed Fix Lets see what the bots think. 1393434 3 332351 joepeck 2018-01-25 21:26:38 -0800 Created attachment 332351 [BEFORE] JSCBuiltins.cpp 1393435 4 ews-watchlist 2018-01-25 21:26:54 -0800 This patch modifies the JS builtins code generator. Please ensure that you have rebaselined any generator test results (i.e., by running `Tools/Scripts/run-builtins-generator-tests --reset-results`) 1393436 5 332352 joepeck 2018-01-25 21:26:57 -0800 Created attachment 332352 [AFTER] JSCBuiltins.cpp 1393437 6 ews-watchlist 2018-01-25 21:27:03 -0800 Attachment 332350 did not pass style-queue: ERROR: Source/JavaScriptCore/Scripts/builtins/builtins_model.py:130: expected 1 blank line, found 0 [pep8/E301] [5] Total errors found: 1 in 2 files If any of these errors are false positives, please file a bug against check-webkit-style. 1393438 7 joepeck 2018-01-25 21:28:23 -0800 This would also minify WebCore's many built-ins, but those are spread across many files. 1393439 8 keith_miller 2018-01-25 21:29:39 -0800 Looks like you need to rebase. 1393442 9 332350 keith_miller 2018-01-25 21:34:07 -0800 Comment on attachment 332350 [PATCH] Proposed Fix View in context: https://bugs.webkit.org/attachment.cgi?id=332350&action=review r=me. I always wished we had a static UnlinkedBytecode for builtin js functions... that seems hard for non-webcore though. Also, why not just remove all extraneous whitespace? I doubt it would matter much in practice, though. > Source/JavaScriptCore/Scripts/builtins/builtins_model.py:129 > - if os.getenv("CONFIGURATION", "Debug").startswith("Debug"): > + if not os.getenv("CONFIGURATION", "Debug").startswith("Debug"): Awesome! 1393443 10 332353 joepeck 2018-01-25 21:34:08 -0800 Created attachment 332353 [PATCH] Proposed Fix Rebaselined. 1393444 11 ews-watchlist 2018-01-25 21:36:07 -0800 Attachment 332353 did not pass style-queue: ERROR: Source/JavaScriptCore/Scripts/builtins/builtins_model.py:130: expected 1 blank line, found 0 [pep8/E301] [5] Total errors found: 1 in 2 files If any of these errors are false positives, please file a bug against check-webkit-style. 1393445 12 joepeck 2018-01-25 21:37:04 -0800 (In reply to Keith Miller from comment #9) > Comment on attachment 332350 [details] > [PATCH] Proposed Fix > > View in context: > https://bugs.webkit.org/attachment.cgi?id=332350&action=review > > r=me. I always wished we had a static UnlinkedBytecode for builtin js > functions... that seems hard for non-webcore though. Also, why not just > remove all extraneous whitespace? I doubt it would matter much in practice, > though. I just wanted a cheap solution to eliminate a lot of whitespace. I can entirely eliminate it in Release builds. We could run the jsmin minifier eventually, but a concern there is our jsmin not knowing about new JavaScript syntax could choke and I didn't want something like that to block JavaScriptCore developers from building. 1393446 13 joepeck 2018-01-25 21:39:40 -0800 In fact that is what I'll do. I'll eliminate all leading whitespace if the bots seem good with it, since thats an even easier patch. I'll put it up in parallel. 1393447 14 332354 joepeck 2018-01-25 21:41:47 -0800 Created attachment 332354 [PATCH] Eliminate all leading whitespace version 1393448 15 keith_miller 2018-01-25 21:42:52 -0800 (In reply to Joseph Pecoraro from comment #12) > (In reply to Keith Miller from comment #9) > > Comment on attachment 332350 [details] > > [PATCH] Proposed Fix > > > > View in context: > > https://bugs.webkit.org/attachment.cgi?id=332350&action=review > > > > r=me. I always wished we had a static UnlinkedBytecode for builtin js > > functions... that seems hard for non-webcore though. Also, why not just > > remove all extraneous whitespace? I doubt it would matter much in practice, > > though. > > I just wanted a cheap solution to eliminate a lot of whitespace. I can > entirely eliminate it in Release builds. > > We could run the jsmin minifier eventually, but a concern there is our jsmin > not knowing about new JavaScript syntax could choke and I didn't want > something like that to block JavaScriptCore developers from building. Sure, I think the conversion to unlinked bytecode would solve that but minifying seems more expedient -- and less of a PITA for the build system --. 1393587 16 332354 commit-queue 2018-01-26 11:32:10 -0800 Comment on attachment 332354 [PATCH] Eliminate all leading whitespace version Clearing flags on attachment: 332354 Committed r227685: <https://trac.webkit.org/changeset/227685> 1393588 17 commit-queue 2018-01-26 11:32:11 -0800 All reviewed patches have been landed. Closing bug. 1393589 18 webkit-bug-importer 2018-01-26 11:33:34 -0800 <rdar://problem/36917860> 1393618 19 jlewis3 2018-01-26 12:47:16 -0800 This caused the builtins-generator-tests to fail. https://build.webkit.org/builders/Apple%20High%20Sierra%20Release%20WK1%20(Tests)/builds/2977 https://build.webkit.org/builders/Apple%20High%20Sierra%20Release%20WK1%20(Tests)/builds/2977/steps/builtins-generator-tests/logs/stdio 1393643 20 joepeck 2018-01-26 13:18:06 -0800 (In reply to Matt Lewis from comment #19) > This caused the builtins-generator-tests to fail. > > https://build.webkit.org/builders/ > Apple%20High%20Sierra%20Release%20WK1%20(Tests)/builds/2977 > > https://build.webkit.org/builders/ > Apple%20High%20Sierra%20Release%20WK1%20(Tests)/builds/2977/steps/builtins- > generator-tests/logs/stdio These just need to be rebaselined now that our default behavior is to not minify (it was accidentally defaulting to minify before. I'll rebasline them. 1393647 21 joepeck 2018-01-26 13:23:59 -0800 > These just need to be rebaselined now that our default behavior is to not > minify (it was accidentally defaulting to minify before. 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