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LibWeb: Cache lowercased tag name for getElementsByTagName() iteration

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Instead of calling to_lowercase() on two strings for every step while
iterating over the HTMLCollection returned by getElementsByTagName(),
we now cache the lowercased tag name beforehand and reuse it.

2.4x speed-up on WebKit/PerformanceTests/DOM/DOMDivWalk.html
This commit is contained in:
Andreas Kling 2023-08-22 14:34:25 +02:00
parent ec340f03a5
commit 76580bb9ba
5 changed files with 8 additions and 7 deletions
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2
Userland/Libraries/LibWeb/DOM/Attr.h
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@ -29,7 +29,7 @@ public:
DeprecatedFlyString const& namespace_uri() const { return m_qualified_name.namespace_(); }
DeprecatedFlyString const& prefix() const { return m_qualified_name.prefix(); }
DeprecatedFlyString const& local_name() const { return m_qualified_name.local_name(); }
DeprecatedString const& name() const { return m_qualified_name.as_string(); }
DeprecatedFlyString const& name() const { return m_qualified_name.as_string(); }
DeprecatedString const& value() const { return m_value; }
void set_value(DeprecatedString value);