for-in vs object.keys Test
Date tested:
4 years ago
User agent:
Mozilla/5.0 (iPhone; CPU iPhone OS 13_1_2 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/13.0.1 Mobile/15E148 Safari/604.1
Test name
Executions per second
for-in
202946.3 Ops/sec
Object.keys
341000.8 Ops/sec
Benchmark definition (click to collapse):
Script Preparation code:
var obj = { 'a': 1, 'b': 1, 'c': 1, 'd': 1, 'e': 1, 'f': 1, 'g': 1 };
Tests:
for-in
array = []; for (var key in obj) { array.push(key); } console.log("Done: ", array);
Object.keys
Object.keys(obj); console.log("Done: ", array);
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