Run results for: Array concat vs spread vs push spread, loop, apply

Run details:

User agent: Mozilla/5.0 (iPhone; CPU iPhone OS 17_0 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) GSA/311.0.621658582 Mobile/15E148 Safari/604.1

Browser: Mobile Safari 17

Operating system: iOS 17.0

Device Platform: Mobile

Date tested: 2 years ago

Array.prototype.concat

2.9M/s

Push Loop

2.8M/s

spread operator

2.5M/s

Push Apply

2.2M/s

Push Spread

1.8M/s

View exact numbers

Test name	Executions per second
✓ Array.prototype.concat	2,853,713 Ops/sec
Push Loop	2,844,592 Ops/sec
spread operator	2,514,932 Ops/sec
Push Apply	2,168,275 Ops/sec
Push Spread	1,790,330 Ops/sec

Script Preparation code:

var subarrs = [
 [ "hello", true, 7 ],
 [ "yes", "no", "maybe", false, 27 ],
 [ 16, "I", "wonder", "what", "will", "be", "fastest"]
];

Tests: