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Merge pull request #6360 from matrix-org/travis/seed-faster

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Improve arraySeed utility
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Travis Ralston 2021-07-12 14:14:14 -06:00 • committed by GitHub
commit cbce71fd8e
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1 changed files with 3 additions and 5 deletions
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8
src/utils/arrays.ts
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@ -112,11 +112,9 @@ export function arrayRescale(input: number[], newMin: number, newMax: number): n
* @returns {T[]} The array. * @returns {T[]} The array.
*/ */
export function arraySeed<T>(val: T, length: number): T[] { export function arraySeed<T>(val: T, length: number): T[] {
const a: T[] = []; // Size the array up front for performance, and use `fill` to let the browser
for (let i = 0; i < length; i++) { // optimize the operation better than we can with a `for` loop, if it wants.
a.push(val); return new Array<T>(length).fill(val);
}
return a;
} }
/** /**