mirror of
https://github.com/mozilla/gecko-dev.git
synced 2025-11-09 21:00:42 +02:00
7ff7bc8cc2
See the comment about why this is valuable. For a selector like:
.foo:is(.bar) > .baz
Before this patch we'd generate an Dependency for .bar like this:
Dependency {
selector: .bar,
offset: 0,
parent: Some(Dependency {
selector: .foo:is(.bar) > .baz,
offset: 1, // Pointing to the `>` combinator.
parent: None,
}),
}
After this patch we'd generate just:
Dependency {
selector: .foo:is(.bar) > .baz,
offset: 1, // Pointing to the `>` combinator.
parent: None,
}
This is not only less memory but also less work. The reason for that is that,
before this patch, when .bar changes, we'd look the dependency, and see there's
a parent, and then scan that, so we'd match `.bar` two times, one for the
initial dependency, and one for .foo:is(.bar).
Instead, with this we'd only check `.foo:is(.bar)` once.
Differential Revision: https://phabricator.services.mozilla.com/D71423
|
||
|---|---|---|
| .. | ||
| document_state.rs | ||
| element_wrapper.rs | ||
| invalidation_map.rs | ||
| invalidator.rs | ||
| mod.rs | ||
| restyle_hints.rs | ||
| state_and_attributes.rs | ||