Object.assign vs mutate
Date tested:
6 years ago
User agent:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_13_3) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/66.0.3359.181 Safari/537.36
Test name
Executions per second
Object.assign
195971.6 Ops/sec
Mutate
2266631.0 Ops/sec
Benchmark definition (click to collapse):
Script Preparation code:
var numbers = [1,2,3,4,5,6,7,8,9,10];
Tests:
Object.assign
numbers.reduce((obj, i) => Object.assign({}, obj, {i}), {});
Mutate
numbers.reduce((obj, i) => { obj[i] = i; return obj; }, {});
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