Bug 188101

Layout test perf/append-text-nodes-without-renderers.html sometimes fails:

--- /home/slave/webkitgtk/gtk-linux-64-release-tests/build/layout-test-results/perf/append-text-nodes-without-renderers-expected.txt
+++ /home/slave/webkitgtk/gtk-linux-64-release-tests/build/layout-test-results/perf/append-text-nodes-without-renderers-actual.txt
@@ -1,3 +1,50 @@
 Tests that style recalculation time is linear when adding text nodes that do not have renderers. See https://bugs.webkit.org/show_bug.cgi?id=110786
-PASS
+FAIL: got >=O(n^2) expected O(n)
 
+DEBUG LOG:
+run iteration. magnitude 2 jsObjectCountBefore 9511 jsObjectCountAfter 8991
+run iteration. magnitude 4 jsObjectCountBefore 8991 jsObjectCountAfter 9127
+run iteration. magnitude 8 jsObjectCountBefore 9127 jsObjectCountAfter 9133
+run iteration. magnitude 16 jsObjectCountBefore 9133 jsObjectCountAfter 9140
+run iteration. magnitude 32 jsObjectCountBefore 9140 jsObjectCountAfter 9150
+run iteration. magnitude 64 jsObjectCountBefore 9150 jsObjectCountAfter 9160
+run iteration. magnitude 128 jsObjectCountBefore 9160 jsObjectCountAfter 9167
+run iteration. magnitude 256 jsObjectCountBefore 9167 jsObjectCountAfter 9174
+magnitudes: 2,4,8,16,32,64,128,256
+iterations: 2312,1635,599,505,169,137,70,25
+numPoints 8 slope 0.0037230296059223705 intercept -0.011730831220395782 rSquared 0.974932970980389
+numPoints 8 slope 0.15722336432377235 intercept -0.2647928864891182 rSquared 0.6394417506758059
+numPoints 8 slope 0.9096529337753088 intercept -5.278771454659669 rSquared 0.9812968875420188
+rSquared 0.974932970980389 rSquaredXLog 0.6394417506758059 rSquaredXYLog 0.9812968875420188
+numTriesLeft: 2
+run iteration. magnitude 2 jsObjectCountBefore 9174 jsObjectCountAfter 9226
+run iteration. magnitude 4 jsObjectCountBefore 9226 jsObjectCountAfter 9237
+run iteration. magnitude 8 jsObjectCountBefore 9237 jsObjectCountAfter 9245
+run iteration. magnitude 16 jsObjectCountBefore 9245 jsObjectCountAfter 9252
+run iteration. magnitude 32 jsObjectCountBefore 9252 jsObjectCountAfter 9257
+run iteration. magnitude 64 jsObjectCountBefore 9257 jsObjectCountAfter 9264
+run iteration. magnitude 128 jsObjectCountBefore 9264 jsObjectCountAfter 9271
+run iteration. magnitude 256 jsObjectCountBefore 9271 jsObjectCountAfter 9278
+magnitudes: 2,4,8,16,32,64,128,256
+iterations: 2771,1632,929,494,205,136,69,30
+numPoints 8 slope 0.00317623655322629 intercept -0.0020743917593186445 rSquared 0.9943615257795768
+numPoints 8 slope 0.1382112644209542 intercept -0.2306926786386853 rSquared 0.6924534024636437
+numPoints 8 slope 0.9298775022922993 intercept -5.460580296482273 rSquared 0.9956060599952081
+rSquared 0.9943615257795768 rSquaredXLog 0.6924534024636437 rSquaredXYLog 0.9956060599952081
+numTriesLeft: 1
+run iteration. magnitude 2 jsObjectCountBefore 9278 jsObjectCountAfter 9319
+run iteration. magnitude 4 jsObjectCountBefore 9319 jsObjectCountAfter 9330
+run iteration. magnitude 8 jsObjectCountBefore 9330 jsObjectCountAfter 9336
+run iteration. magnitude 16 jsObjectCountBefore 9336 jsObjectCountAfter 9342
+run iteration. magnitude 32 jsObjectCountBefore 9342 jsObjectCountAfter 9352
+run iteration. magnitude 64 jsObjectCountBefore 9352 jsObjectCountAfter 9359
+run iteration. magnitude 128 jsObjectCountBefore 9359 jsObjectCountAfter 9366
+run iteration. magnitude 256 jsObjectCountBefore 9366 jsObjectCountAfter 9370
+magnitudes: 2,4,8,16,32,64,128,256
+iterations: 1809,1673,973,378,225,91,50,36
+numPoints 8 slope 0.0028402264463023826 intercept 0.03154495565663898 rSquared 0.9541075785234839
+numPoints 8 slope 0.13708565015470747 intercept -0.21498300194141542 rSquared 0.817448580360951
+numPoints 8 slope 0.9033708909085951 intercept -5.243970026880438 rSquared 0.9799948543840084
+rSquared 0.9541075785234839 rSquaredXLog 0.817448580360951 rSquaredXYLog 0.9799948543840084
+
+