Run results for: spread array performance (vs slice, splice, concat) - MeasureThat.net

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:121.0) Gecko/20100101 Firefox/121.0

Browser: Firefox 121

Operating system: Windows

Device Platform: Desktop

Date tested: 2 years ago

Concat

68.4M/s

Spread

52.3M/s

Slice

52.3M/s

Splice

40.7M/s

View exact numbers

Test name	Executions per second
✓ Concat	68,412,616 Ops/sec
Spread	52,335,320 Ops/sec
Slice	52,265,412 Ops/sec
Splice	40,741,128 Ops/sec

Tests:

Splice
const testArray = [1, 2, 3]; const newTestArray = testArray.splice(0);
Slice
const testArray = [1, 2, 3]; const newTestArray = testArray.slice();
Concat
const testArray = [1, 2, 3]; const newTestArray = testArray.concat();
Spread
const testArray = [1, 2, 3]; const newTestArray = [...testArray];