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style: Reorder style sharing checks so that cheaper and broader ones are earlier.
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4c797dfb52
commit
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1 changed files with 23 additions and 23 deletions
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@ -656,6 +656,29 @@ impl<E: TElement> StyleSharingCache<E> {
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return None;
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}
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if target.local_name() != candidate.element.local_name() {
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trace!("Miss: Local Name");
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return None;
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}
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if target.namespace() != candidate.element.namespace() {
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trace!("Miss: Namespace");
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return None;
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}
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// We do not ignore visited state here, because Gecko needs to store
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// extra bits on visited style contexts, so these contexts cannot be
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// shared.
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if target.element.state() != candidate.state() {
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trace!("Miss: User and Author State");
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return None;
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}
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if target.is_link() != candidate.element.is_link() {
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trace!("Miss: Link");
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return None;
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}
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// Note that in the XBL case, we should be able to assert that the
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// scopes are different, since two elements with different XBL bindings
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// need to necessarily have different style (and thus children of them
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@ -676,35 +699,12 @@ impl<E: TElement> StyleSharingCache<E> {
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return None;
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}
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if target.local_name() != candidate.element.local_name() {
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trace!("Miss: Local Name");
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return None;
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}
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if target.namespace() != candidate.element.namespace() {
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trace!("Miss: Namespace");
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return None;
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}
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if target.is_link() != candidate.element.is_link() {
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trace!("Miss: Link");
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return None;
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}
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if target.matches_user_and_author_rules() !=
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candidate.element.matches_user_and_author_rules() {
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trace!("Miss: User and Author Rules");
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return None;
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}
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// We do not ignore visited state here, because Gecko
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// needs to store extra bits on visited style contexts,
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// so these contexts cannot be shared
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if target.element.state() != candidate.state() {
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trace!("Miss: User and Author State");
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return None;
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}
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// It's possible that there are no styles for either id.
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let may_match_different_id_rules =
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checks::may_match_different_id_rules(
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