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LibWeb: Cache CSS::Selector's pseudo element at construction time

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Computing the pseudo element of a CSS::Selector was very hot when
mousing around on GitHub in Browser. A profile had it at ~10%.
After these changes, it's totally gone from the profile. :^)
This commit is contained in:
Andreas Kling 2022-03-13 16:28:20 +01:00
parent f5c2e87965
commit f88d65d9cb
2 changed files with 12 additions and 14 deletions
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3
Userland/Libraries/LibWeb/CSS/Selector.h
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@ -135,7 +135,7 @@ public:
~Selector();
Vector<CompoundSelector> const& compound_selectors() const { return m_compound_selectors; }
Optional<PseudoElement> pseudo_element() const;
Optional<PseudoElement> pseudo_element() const { return m_pseudo_element; }
u32 specificity() const;
String serialize() const;
@ -144,6 +144,7 @@ private:
Vector<CompoundSelector> m_compound_selectors;
mutable Optional<u32> m_specificity;
Optional<Selector::PseudoElement> m_pseudo_element;
};
constexpr StringView pseudo_element_name(Selector::PseudoElement pseudo_element)