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LibWeb: Cache lowercased tag name for getElementsByTagName() iteration
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
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5 changed files with 8 additions and 7 deletions
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@ -705,7 +705,7 @@ void Element::make_html_uppercased_qualified_name()
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{
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// This is allowed by the spec: "User agents could optimize qualified name and HTML-uppercased qualified name by storing them in internal slots."
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if (namespace_() == Namespace::HTML && document().document_type() == Document::Type::HTML)
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m_html_uppercased_qualified_name = qualified_name().to_uppercase();
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m_html_uppercased_qualified_name = DeprecatedString(qualified_name()).to_uppercase();
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else
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m_html_uppercased_qualified_name = qualified_name();
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}
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