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User:Jdm/SlowCSSSelectors: Difference between revisions
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(Created page with "https://developer.mozilla.org/en/Writing_Efficient_CSS http://mxr.mozilla.org/mozilla-central/source/layout/style/nsCSSRuleProcessor.cpp http://mxr.mozilla.org/mozilla-central/so...") |
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https://developer.mozilla.org/en/Writing_Efficient_CSS | https://developer.mozilla.org/en/Writing_Efficient_CSS | ||
http://mxr.mozilla.org/mozilla-central/source/layout/style/nsCSSRuleProcessor.cpp | http://mxr.mozilla.org/mozilla-central/source/layout/style/nsCSSRuleProcessor.cpp | ||
http://mxr.mozilla.org/mozilla-central/source/layout/style/nsCSSRuleProcessor.h | http://mxr.mozilla.org/mozilla-central/source/layout/style/nsCSSRuleProcessor.h | ||
http://mxr.mozilla.org/mozilla-central/source/layout/style/StyleRule.h | http://mxr.mozilla.org/mozilla-central/source/layout/style/StyleRule.h | ||
http://mxr.mozilla.org/mozilla-central/source/layout/style/StyleRule.cpp | http://mxr.mozilla.org/mozilla-central/source/layout/style/StyleRule.cpp | ||
http://mxr.mozilla.org/mozilla-central/source/layout/style/nsNthIndexCache.cpp | http://mxr.mozilla.org/mozilla-central/source/layout/style/nsNthIndexCache.cpp | ||
http://mxr.mozilla.org/mozilla-central/source/layout/style/nsNthIndexCache.h | http://mxr.mozilla.org/mozilla-central/source/layout/style/nsNthIndexCache.h | ||
Functions like SelectorMatches show up in C++ profiles when CSS selector matching is being a problem. However, that is too low level - individual calls of SelectorMatches are fast, but the sheer volume of calls causes the problem. Instead, RuleHash is used to avoid even looking at most selectors. | Functions like SelectorMatches show up in C++ profiles when CSS selector matching is being a problem. However, that is too low level - individual calls of SelectorMatches are fast, but the sheer volume of calls causes the problem. Instead, RuleHash is used to avoid even looking at most selectors. | ||