Run results for: speed test: concat vs spread vs push BdB

Run details:

User agent: Mozilla/5.0 (iPhone; CPU iPhone OS 18_0_1 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/18.0.1 Mobile/15E148 Safari/604.1

Browser: Mobile Safari 18

Operating system: iOS 18.0.1

Device Platform: Mobile

Date tested: one year ago

Benchmark engine: Benchmark.js

spread

64.5M/s

concat

39.0M/s

push

24.0M/s

View exact numbers

Test name	Executions per second
✓ spread	64,495,576 Ops/sec
concat	39,021,976 Ops/sec
push	23,953,360 Ops/sec

Tests:

concat
let array1 = []; const array2 = ["bird", "snake", "green", "brown", "black", "three", "four" ]; array1 = array1.concat(array2);
push
const array1 = []; const array2 = ["bird", "snake", "green", "brown", "black", "three", "four" ]; array1.push(...array2);
spread
let array1 = []; const array2 = ["bird", "snake", "green", "brown", "black", "three", "four" ]; array1 = [...array1, ...array2];