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Run results for:
array concat performance test (splice, concat, spread, push with spread)
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<iframe src="https://measurethat.net/Embed?id=600050" width="100%" height="500px"></iframe>
Run details:
User agent:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/135.0.0.0 Safari/537.36
Browser:
Chrome 135
Operating system:
Mac OS X 10.15.7
Device Platform:
Desktop
Date tested:
one year ago
Concat
17.1M/s
Spread
8.9M/s
push-spread
8.4M/s
Splice
6.6M/s
View exact numbers
Test name
Executions per second
✓
Concat
17,069,680 Ops/sec
Spread
8,941,482 Ops/sec
push-spread
8,430,439 Ops/sec
Splice
6,635,312 Ops/sec
Tests:
Splice
const testArray1 = [1, 2, 3]; const testArray2 = [4, 5, 6]; const newTestArray = testArray1.splice(testArray1.length, 0, ...testArray2);
Concat
const testArray = [1, 2, 3]; const testArray2 = [4, 5, 6]; const newTestArray = testArray.concat(testArray2);
Spread
const testArray = [1, 2, 3]; const testArray2 = [4, 5, 6]; const newTestArray = [...testArray, ...testArray2];
push-spread
const testArray = [1, 2, 3]; const testArray2 = [4, 5, 6]; const newTestArray = testArray.push(...testArray2);