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style: Avoid some allocations in selector serialization.

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The allocations in display_to_css_identifier show up in the profiles of
bug 1675628.

Differential Revision: https://phabricator.services.mozilla.com/D97856
This commit is contained in:
Emilio Cobos Álvarez 2020-11-22 01:02:22 +00:00
parent 4ea378a6ae
commit 9f40b9ba38
19 changed files with 220 additions and 114 deletions
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4
components/style/stylist.rs
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@ -1651,7 +1651,7 @@ impl<'a> SelectorVisitor for StylistSelectorVisitor<'a> {
//
// NOTE(emilio): See the comment regarding on when this may
// break in visit_complex_selector.
self.mapped_ids.insert(id.clone());
self.mapped_ids.insert(id.0.clone());
},
_ => {},
}
@ -2078,7 +2078,7 @@ impl CascadeData {
self.part_rules
.get_or_insert_with(|| Box::new(Default::default()))
.for_insertion(pseudo_element)
.try_entry(parts.last().unwrap().clone())?
.try_entry(parts.last().unwrap().clone().0)?
.or_insert_with(SmallVec::new)
.try_push(rule)?;
} else {