MeasureThat.net

Run results for: javascript loops small

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Run details:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10.6; rv:48.0) Gecko/20100101 Firefox/48.0
Firefox 48
Mac OS X 10.6
Desktop
one year ago
Test name Executions per second
foreach 157075.2 Ops/sec
for-in 88800.1 Ops/sec
for-of 160777.2 Ops/sec
for 198278.4 Ops/sec
optimized-for 212082.1 Ops/sec
Tests:

  • foreach

    ​x
     
    const items = Array.from({length: 10}, () => Math.floor(Math.random() * 40));
    let index = 0;
    ​
    items.forEach(i => index++);

  • for-in

     
    const items = Array.from({length: 10}, () => Math.floor(Math.random() * 40));
    let index = 0;
    ​
    for (let i in items) {
        index++;
    }

  • for-of

     
    const items = Array.from({length: 10}, () => Math.floor(Math.random() * 40));
    let index = 0;
    ​
    for (let i of items) {
        index++;
    }

  • for

     
    const items = Array.from({length: 10}, () => Math.floor(Math.random() * 40));
    let index = 0;
    ​
    for(let i = 0; i < items.length; ++i) {
      index++;
    }

  • optimized-for

     
    const items = Array.from({length: 10}, () => Math.floor(Math.random() * 40));
    let index = 0;
    ​
    for(let i = items.length; i > 0; --i) {
      index++;
    }