Run results for: clone and splice vs map

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/121.0.0.0 Safari/537.36

Browser: Chrome 121

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 2 years ago

Benchmark engine: Benchmark.js

clone and splice

254K/s

map

170K/s

View exact numbers

Test name	Executions per second
✓ clone and splice	254,078 Ops/sec
map	169,711 Ops/sec

Tests:

clone and splice
let a = new Array(1000).fill().map((_,i) => i); let b = [...a]; b.splice(500, 10, ...new Array(10).fill().map((_,i) => i*10));
map
let a = new Array(1000).fill().map((_,i) => i); let b = new Array(10).fill().map((_,i) => i*10) let c = a.map((item, i) => i >= 500 && i < 510 ? b[i - 500] : item)