layout: Avoid flooding the compositor with animation state changes if

there are no animations running and no new animations were added.

Avoids compositor jank during scroll.
This commit is contained in:
Patrick Walton 2015-11-02 16:33:41 -08:00
parent db1163b1ec
commit 8d58197bf0

View file

@ -58,6 +58,12 @@ pub fn update_animation_state(rw_data: &mut LayoutTaskData, pipeline_id: Pipelin
let mut running_animations_hash = (*rw_data.running_animations).clone();
if running_animations_hash.is_empty() && new_running_animations.is_empty() {
// Nothing to do. Return early so we don't flood the compositor with
// `ChangeRunningAnimationsState` messages.
return
}
// Expire old running animations.
let now = clock_ticks::precise_time_s();
let mut keys_to_remove = Vec::new();