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LibWeb: Cache the qualified layer name in CSSRule

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This makes cascade layer filtering take <2% of CPU time when loading
https://vercel.com instead of 30%.
This commit is contained in:
Andreas Kling 2024-09-07 11:45:50 +02:00 • committed by Andreas Kling
commit 44e4ea3d7a
Notes: github-actions[bot] 2024-09-07 11:24:51 +00:00
4 changed files with 33 additions and 31 deletions
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3
Userland/Libraries/LibWeb/CSS/CSSLayerBlockRule.cpp
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@ -71,8 +71,7 @@ String CSSLayerBlockRule::serialized() const
FlyString CSSLayerBlockRule::internal_qualified_name(Badge<StyleComputer>) const
{
// TODO: Cache this?
auto parent_name = parent_layer_internal_qualified_name();
auto const& parent_name = parent_layer_internal_qualified_name();
if (parent_name.is_empty())
return m_name_internal;
return MUST(String::formatted("{}.{}", parent_name, m_name_internal));