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Run results for:
Array.map vs preallocation ckck
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Run details:
User agent:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36
Browser:
Chrome 120
Operating system:
Mac OS X 10.15.7
Device Platform:
Desktop
Date tested:
2 years ago
Test name
Executions per second
Map
109.3 Ops/sec
Preallocation
325.7 Ops/sec
Tests:
Map
const array2 = new Array(1000000).map((item, index) => index);
Preallocation
const array2 = new Array(1000000); for (let i = 0; i < array2.length; i++) array2[i] = i;