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Run results for:
For in vs For object.keys() vs lodash each
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Run details:
User agent:
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/139.0.0.0 Safari/537.36
Browser:
Chrome 139
Operating system:
Windows
Device Platform:
Desktop
Date tested:
9 months ago
Test name
Executions per second
For in
9431660.0 Ops/sec
For object keys
68245360.0 Ops/sec
Lodash each
4851720.0 Ops/sec
HTML Preparation code:
<script src='https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.5/lodash.min.js'></script>
Script Preparation code:
var obj = {a:1, b:2, c:3, d:4, f:5, h:6, j:7, i:8, k:9, o:0};
Tests:
For in
var result = {}; for(let i in obj) { result[i] = obj[i]; }
For object keys
var result = {}; var keys = Object.keys(obj); for(let i=0; i<obj.length; ++i) { result[i] = obj[i]; }
Lodash each
var result = {}; _.each(obj, (v, i) => result[i] = v);