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Run results for:
Javascript Filter Object
Javascript Filter Object
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<iframe src="https://measurethat.net/Embed?id=599842" width="100%" height="500px"></iframe>
Run details:
User agent:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/135.0.0.0 Safari/537.36
Browser:
Chrome 135
Operating system:
Mac OS X 10.15.7
Device Platform:
Desktop
Date tested:
one year ago
Test name
Executions per second
Test 1
73504888.0 Ops/sec
Test 2
23872286.0 Ops/sec
Tests:
Test 1
let obj = { 'a': 1, 'b': 2, 'c': 3 }; let condVal = 2; let result = {}, key; for (key in obj) { if (obj.hasOwnProperty(key) && condVal == obj[key]) { result[key] = obj[key]; } }
Test 2
let obj = { 'a': 1, 'b': 2, 'c': 3 }; let condVal = 2; Object.keys(obj) .filter( key => condVal == obj[key] ) .reduce( (res, key) => (res[key] = obj[key], res), {} );