MeasureThat.net

Run results for: Object spread vs New map with string keys

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Run details:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_4) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/103.0.0.0 Safari/537.36
Chrome 103
Mac OS X 10.14.4
Desktop
2 years ago
Test name Executions per second
Obj spread 16.4 Ops/sec
new Map 74.1 Ops/sec
Script Preparation code:
AخA
 
var data = new Array(100000).fill(undefined).map((_,i) => i)
var obj = data.reduce((obj, idx) => {obj['idx' + idx] = idx; return obj}, {});
var map = new Map(Object.entries(obj));
Tests:

  • Obj spread

     
    let a = {...obj};

  • new Map

     
    let a = new Map(map);