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LibWeb: Add per-layer rule caches in StyleComputer

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This allows us to filter by layer *once* instead of doing it for every
rule that runs.

Knocks ~2 seconds of loading time off of https://wpt.fyi/
This commit is contained in:
Andreas Kling 2025-01-24 10:27:52 +01:00 • committed by Andreas Kling
commit 3b3f06ca68
Notes: github-actions[bot] 2025-01-24 16:55:50 +00:00
2 changed files with 35 additions and 37 deletions
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9
Libraries/LibWeb/CSS/StyleComputer.h
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@ -272,9 +272,13 @@ private:
HashMap<FlyString, NonnullRefPtr<Animations::KeyframeEffect::KeyFrameSet>> rules_by_animation_keyframes;
};
NonnullOwnPtr<RuleCache> make_rule_cache_for_cascade_origin(CascadeOrigin, SelectorInsights&, Vector<MatchingRule>& hover_rules);
struct BuiltRuleCaches {
NonnullOwnPtr<RuleCache> main_rules;
HashMap<FlyString, NonnullOwnPtr<RuleCache>> layer_rules;
};
[[nodiscard]] BuiltRuleCaches make_rule_cache_for_cascade_origin(CascadeOrigin, SelectorInsights&, Vector<MatchingRule>& hover_rules);
RuleCache const& rule_cache_for_cascade_origin(CascadeOrigin) const;
[[nodiscard]] RuleCache const* rule_cache_for_cascade_origin(CascadeOrigin, FlyString const& qualified_layer_name) const;
static void collect_selector_insights(Selector const&, SelectorInsights&);
@ -282,6 +286,7 @@ private:
Vector<MatchingRule> m_hover_rules;
OwnPtr<StyleInvalidationData> m_style_invalidation_data;
OwnPtr<RuleCache> m_author_rule_cache;
HashMap<FlyString, NonnullOwnPtr<RuleCache>> m_layer_rule_caches;
OwnPtr<RuleCache> m_user_rule_cache;
OwnPtr<RuleCache> m_user_agent_rule_cache;
GC::Root<CSSStyleSheet> m_user_style_sheet;