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Run results for:
Add item to array: push vs spread vs assign:
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Run details:
User agent:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:148.0) Gecko/20100101 Firefox/148.0
Browser:
Firefox 148
Operating system:
Mac OS X 10.15
Device Platform:
Desktop
Date tested:
2 months ago
Test name
Executions per second
Push item to an array
401823.6 Ops/sec
Append an item by spread
442.7 Ops/sec
Direct assign an item to an initialized array
428812.7 Ops/sec
Script Preparation code:
window.MAX_SIZE = 1000;
Tests:
Push item to an array
const items = []; for (let i = 0; i < MAX_SIZE; i++) { items.push(i); }
Append an item by spread
let items = []; for (let i = 0; i < MAX_SIZE; i++) { items = [...items, i]; }
Direct assign an item to an initialized array
const items = new Array(MAX_SIZE); for (let i = 0; i < MAX_SIZE; i++) { items[i] = i; }