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:85.0) Gecko/20100101 Firefox/85.0

Browser: Firefox 85

Operating system: Windows

Device Platform: Desktop

Date tested: 3 years ago

Test name	Executions per second
Splice	3708566.0 Ops/sec
Slice	9006665.0 Ops/sec
Concat	4937178.0 Ops/sec
Spread	3514657.0 Ops/sec

Website performance monitoring

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];