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Remove usage of Array#fill (#20071)

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Dan Abramov 2020-10-21 13:17:44 +01:00 committed by Dan Abramov
parent 89b610969d
commit 8e5adfbd7e
1 changed files with 7 additions and 1 deletions
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8
packages/react-reconciler/src/ReactFiberLane.js vendored
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@ -640,7 +640,13 @@ export function higherLanePriority(
}
export function createLaneMap<T>(initial: T): LaneMap<T> {
return new Array(TotalLanes).fill(initial);
// Intentionally pushing one by one.
// https://v8.dev/blog/elements-kinds#avoid-creating-holes
const laneMap = [];
for (let i = 0; i < TotalLanes; i++) {
laneMap.push(initial);
}
return laneMap;
}
export function markRootUpdated(