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LibJS: Add fast_is<T> helpers for all the primitive wrapper objects

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The JS runtime is full of checks for is<NumberObject> and friends.
They were showing up in a Speedometer profile as ~1% spent in
dynamic_cast, and this basically chops that down to nothing.
This commit is contained in:
Andreas Kling 2025-03-25 08:34:06 +00:00 • committed by Andreas Kling
commit c12f8b80dc
Notes: github-actions[bot] 2025-03-25 23:58:13 +00:00
7 changed files with 35 additions and 0 deletions
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4
Libraries/LibJS/Runtime/RegExpObject.h
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@ -74,6 +74,7 @@ private:
RegExpObject(Object& prototype);
RegExpObject(Regex<ECMA262> regex, String pattern, String flags, Object& prototype);
virtual bool is_regexp_object() const final { return true; }
virtual void visit_edges(Visitor&) override;
String m_pattern;
@ -85,6 +86,9 @@ private:
Optional<Regex<ECMA262>> m_regex;
};
template<>
inline bool Object::fast_is<RegExpObject>() const { return is_regexp_object(); }
AK_ENUM_BITWISE_OPERATORS(RegExpObject::Flags);
}