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style: Bail out from invalidation if we're the root and got tons of descendant invalidations.

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Bug: 1420741
Reviewed-by: heycam
MozReview-Commit-ID: 4Kja20Ep9qD
This commit is contained in:
Emilio Cobos Álvarez 2017-11-28 12:05:30 +01:00
parent cc8f9305e4
commit 2beb441d04
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1 changed files with 11 additions and 0 deletions
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11
components/style/invalidation/element/collector.rs
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@ -229,6 +229,17 @@ where
collector.invalidates_self
};
// If we generated a ton of descendant invalidations, it's probably not
// worth to go ahead and try to process them.
//
// Just restyle the descendants directly.
//
// This number is completely made-up, but the page that made us add this
// code generated 1960+ invalidations (bug 1420741).
if descendant_invalidations.len() > 150 {
self.data.hint.insert(RestyleHint::RESTYLE_DESCENDANTS);
}
if invalidated_self {
self.data.hint.insert(RestyleHint::RESTYLE_SELF);
}