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Run results for:
for in loop vs. .map
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Run details:
User agent:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:147.0) Gecko/20100101 Firefox/147.0
Browser:
Firefox 147
Operating system:
Mac OS X 10.15
Device Platform:
Desktop
Date tested:
2 months ago
Test name
Executions per second
.map
16651902.0 Ops/sec
for loop
11257887.0 Ops/sec
Script Preparation code:
// Create sample data var array = [1,2,3,4,5,6,7,8,9,0]; var manipulateFn = num => { return num * 2 * 3; }
Tests:
.map
const newArray = array.map(i => manipulateFn(i));
for loop
const newArray = []; for (let val of array) { newArray.push(manipulateFn(val)); }