MeasureThat.net

Run results for: forEach vs for loop v3

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Run details:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/103.0.0.0 Safari/537.36
Chrome 103
Mac OS X 10.15.7
Desktop
2 years ago
Test name Executions per second
smallArray forEach 16400891.0 Ops/sec
smallArray for loop 1666786.1 Ops/sec
mediumArray forEach 10257451.0 Ops/sec
mediumArray for loop 185359.2 Ops/sec
largeArray forEach 2795250.2 Ops/sec
largeArray for loop 18683.2 Ops/sec
hugeArray forEach 48655.7 Ops/sec
hugeArray for loop 1892.9 Ops/sec
Script Preparation code:
​x
 
var smallArray = [];
var mediumArray = [];
var largeArray = [];
var hugeArray = [];
​
for (let i = 0; i < 10; i++) {
  smallArray.push(i);
}
​
for (let i = 0; i < 100; i++) {
  mediumArray.push(i);
}
​
for (let i = 0; i < 1000; i++) {
  largeArray.push(i);
}
​
for (let i = 0; i < 10000; i++) {
  hugeArray.push(i);
}
Tests:

  • smallArray forEach

     
    smallArray.forEach(item => {
      item += 1;
    })

  • smallArray for loop

     
    for (let i = 0, l = smallArray.length; i < l; i++) {
      smallArray[i] += 1;
    }

  • mediumArray forEach

     
    mediumArray.forEach(item => {
      item += 1;
    })

  • mediumArray for loop

     
    for (let i = 0, l = mediumArray.length; i < l; i++) {
      mediumArray[i] += 1;
    }

  • largeArray forEach

     
    largeArray.forEach(item => {
      item += 1;
    })

  • largeArray for loop

     
    for (let i = 0, l = largeArray.length; i < l; i++) {
      largeArray[i] += 1;
    }

  • hugeArray forEach

     
    hugeArray.forEach(item => {
      item += 1;
    })

  • hugeArray for loop

     
    for (let i = 0, l = hugeArray.length; i < l; i++) {
      hugeArray[i] += 1;
    }