Array.fromAsync()とPromise.all()の違い【JavaScript】 - Qiita

ようわからんかったのでメモ TL;DR Array.fromAsync()は順次実行 Promise.all()は同時実行 const sleep = delay => new Promise(resolve => setTimeout(resolve, delay)) console.time() await Array.fromAsync([200, 100, 300], sleep) console.timeEnd() // elapsed: 600ms console.time() await Promise.all([200, 100, 300].map(sleep)) console.timeEnd() // elapsed: 300ms const sleep = delay => new Promise(resolve => setTimeout(() => resolve

[jay-es]

Array.fromAsync() は順次実行、Promise.all() は同時実行

[mevota4961]

便利