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Run results for:
Reduce vs Map+FromEntries vs for loop
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Run details:
User agent:
Mozilla/5.0 (iPhone; CPU iPhone OS 18_7 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/26.4 Mobile/15E148 Safari/604.1
Browser:
Mobile Safari 26
Operating system:
iOS 18.7
Device Platform:
Mobile
Date tested:
2 months ago
Test name
Executions per second
reduce
629.0 Ops/sec
map + fromEntries
516.1 Ops/sec
for loop
454.9 Ops/sec
Script Preparation code:
var data = Array.from(Array(10000).keys());
Tests:
reduce
Object.entries(data).reduce((acc, [k, v]) => { acc[k] = v.toString(); return acc; }, {});
map + fromEntries
Object.fromEntries(Object.entries(data).map(([k, v]) => ([k, v.toString()])));
for loop
const dataObject = Object.entries(data) const acc = {} for (let i = 0; i < dataObject.length; i++) { const [k, v] = dataObject[i]; acc[k] = v.toString() }