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Run results for:
Map & Object.fromEntries vs reduce
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Run details:
User agent:
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/130.0.0.0 Safari/537.36
Browser:
Chrome 130
Operating system:
Windows
Device Platform:
Desktop
Date tested:
one year ago
Test name
Executions per second
map & fromEntries
1256.4 Ops/sec
reduce
156.4 Ops/sec
Script Preparation code:
var data = Array.from(Array(10000).keys()); var f = v => v + ';';
Tests:
map & fromEntries
Object.fromEntries(data.map(x => [x, f(x)]));
reduce
data.reduce((acc, x) => ({...acc, [x]: f(x)}), {});