126199 2013-12-23 19:02:32 -0800 Use the Selector Code Generator for resolving style 2014-01-13 16:23:46 -0800 1 1 1 Unclassified WebKit New Bugs 528+ (Nightly build) Unspecified Unspecified RESOLVED FIXED P2 Normal --- 1 benjamin benjamin commit-queue eflews.bot esprehn+autocc glenn gtk-ews gyuyoung.kim koivisto ltilve+ews macpherson menard rniwa xan.lopez oldest_to_newest 962685 0 benjamin 2013-12-23 19:02:32 -0800 Use the Selector Code Generator for resolving style 962686 1 219952 benjamin 2013-12-23 19:03:03 -0800 Created attachment 219952 Patch 962689 2 219952 eflews.bot 2013-12-23 19:07:19 -0800 Comment on attachment 219952 Patch Attachment 219952 did not pass efl-ews (efl): Output: http://webkit-queues.appspot.com/results/50458029 962707 3 219952 eflews.bot 2013-12-23 20:48:18 -0800 Comment on attachment 219952 Patch Attachment 219952 did not pass efl-wk2-ews (efl-wk2): Output: http://webkit-queues.appspot.com/results/45698122 962715 4 219952 gtk-ews 2013-12-23 22:47:09 -0800 Comment on attachment 219952 Patch Attachment 219952 did not pass gtk-ews (gtk): Output: http://webkit-queues.appspot.com/results/51868073 963024 5 219952 koivisto 2013-12-26 12:15:25 -0800 Comment on attachment 219952 Patch View in context: https://bugs.webkit.org/attachment.cgi?id=219952&action=review > Source/WebCore/css/ElementRuleCollector.cpp:301 > inline bool ElementRuleCollector::ruleMatches(const RuleData& ruleData, PseudoId& dynamicPseudo) > { > const StyleResolver::State& state = m_state; > +#if ENABLE(CSS_SELECTOR_JIT) > + void* compiledSelectorChecker = ruleData.compiledSelectorCodeRef.code().executableAddress(); > + if (!compiledSelectorChecker && ruleData.compilationStatus == SelectorCompilationStatus::NotCompiled) { > + JSC::VM* vm = document().scriptExecutionContext()->vm(); > + ruleData.compilationStatus = SelectorCompiler::compileSelector(ruleData.selector(), vm, ruleData.compiledSelectorCodeRef); > + compiledSelectorChecker = ruleData.compiledSelectorCodeRef.code().executableAddress(); > + } This compiles too eagerly. If you look below in ruleData.hasFastCheckableSelector() branch you see there are number of cases we resolve without calling into SelectorCheckerFastPath at all. Those cases will use more memory and may get slower by activating the JIT. We should probably not compile selectors that are in this category. Does the infrastructure support compiling off the main thread? I think optimally we would kick off the compiling during RuleData construction and use the compiled versions when ready. > Source/WebCore/css/ElementRuleCollector.cpp:312 > + if (compiledSelectorChecker) { > + if (ruleData.compilationStatus == SelectorCompilationStatus::SimpleSelectorChecker) { > + if (m_pseudoStyleRequest.pseudoId != NOPSEUDO) > + return false; > + SelectorCompiler::SimpleSelectorChecker selectorChecker = SelectorCompiler::simpleSelectorCheckerFunction(compiledSelectorChecker, ruleData.compilationStatus); > + return selectorChecker(state.element()); > + } > + ASSERT(ruleData.compilationStatus == SelectorCompilationStatus::SelectorCheckerWithCheckingContext); > + > + if (m_pseudoStyleRequest.pseudoId != NOPSEUDO) > + return false; NOPSEUDO tests can move before the compilationStatus check and combined. > Source/WebCore/css/RuleSet.h:84 > +#if ENABLE(CSS_SELECTOR_JIT) > + mutable SelectorCompilationStatus compilationStatus; > + mutable JSC::MacroAssemblerCodeRef compiledSelectorCodeRef; > +#endif // ENABLE(CSS_SELECTOR_JIT) These fields should be optimized for memory at some point (I think we can manage with 64bits or less for all this). We can have large numbers of selectors and so RuleDatas. We also shouldn't generate code for simplest selectors that are resolved by hash look-ups and don't need overhead of even having these fields. 967095 6 220991 benjamin 2014-01-12 17:29:18 -0800 Created attachment 220991 Patch 967130 7 220991 eflews.bot 2014-01-12 19:41:24 -0800 Comment on attachment 220991 Patch Attachment 220991 did not pass efl-ews (efl): Output: http://webkit-queues.appspot.com/results/6029259655086080 967138 8 220991 gtk-ews 2014-01-12 20:54:17 -0800 Comment on attachment 220991 Patch Attachment 220991 did not pass gtk-ews (gtk): Output: http://webkit-queues.appspot.com/results/6717223087374336 967147 9 220991 eflews.bot 2014-01-12 21:45:20 -0800 Comment on attachment 220991 Patch Attachment 220991 did not pass efl-wk2-ews (efl-wk2): Output: http://webkit-queues.appspot.com/results/6353650481889280 967149 10 221004 benjamin 2014-01-12 22:04:24 -0800 Created attachment 221004 Patch 967341 11 221004 rniwa 2014-01-13 08:40:06 -0800 Comment on attachment 221004 Patch View in context: https://bugs.webkit.org/attachment.cgi?id=221004&action=review > Source/WebCore/css/ElementRuleCollector.cpp:312 > + JSC::VM* vm = document().scriptExecutionContext()->vm(); We should be using a reference instead in all these places (probably should be done in a separate patch though). > Source/WebCore/css/ElementRuleCollector.cpp:321 > + SelectorCompiler::SimpleSelectorChecker selectorChecker = SelectorCompiler::simpleSelectorCheckerFunction(compiledSelectorChecker, ruleData.compilationStatus); Do we really need this temporary variable? Also, isn't this the case where auto will be useful? Since this is a function pointer into a JIT'ed code, type doesn't give us any extra information anyway. > Source/WebCore/css/RuleSet.h:84 > +#if ENABLE(CSS_SELECTOR_JIT) > + mutable SelectorCompilationStatus compilationStatus; > + mutable JSC::MacroAssemblerCodeRef compiledSelectorCodeRef; > +#endif // ENABLE(CSS_SELECTOR_JIT) > + These should really be private and have accessors instead. 967525 12 benjamin 2014-01-13 16:23:46 -0800 Committed r161917: <http://trac.webkit.org/changeset/161917> 219952 2013-12-23 19:03:03 -0800 2014-01-12 17:29:14 -0800 Patch bug-126199-20131223190302.patch text/plain 4489 benjamin U3VidmVyc2lvbiBSZXZpc2lvbjogMTYxMDQzCmRpZmYgLS1naXQgYS9Tb3VyY2UvV2ViQ29yZS9D aGFuZ2VMb2cgYi9Tb3VyY2UvV2ViQ29yZS9DaGFuZ2VMb2cKaW5kZXggY2MzYmFlZGVkOTgzODc3 MDdhN2VlM2EwMGNmN2FmYzFhZmNkZTgzZC4uNGVhZTkzNmMxOWYyNGM0Zjg2MjU2ZGQ4YTY0NzE2 YWYxNmEwMjg2MSAxMDA2NDQKLS0tIGEvU291cmNlL1dlYkNvcmUvQ2hhbmdlTG9nCisrKyBiL1Nv 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