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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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11
components/style/gecko_string_cache/namespace.rs
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@ -47,18 +47,9 @@ impl PrecomputedHash for Namespace {
}
/// A Gecko WeakNamespace is a wrapped WeakAtom.
#[derive(Hash)]
#[derive(Hash, Deref)]
pub struct WeakNamespace(WeakAtom);
impl Deref for WeakNamespace {
type Target = WeakAtom;
#[inline]
fn deref(&self) -> &WeakAtom {
&self.0
}
}
impl Deref for Namespace {
type Target = WeakNamespace;