Run results for: splice vs copyWithin

Run details:

User agent: Mozilla/5.0 (X11; Linux x86_64; rv:151.0) Gecko/20100101 Firefox/151.0

Browser: Firefox 151

Operating system: Linux

Device Platform: Desktop

Date tested: 3 months ago

Benchmark engine: Benchmark.js

copyWithin()

12.6M/s

splice()

9.5M/s

View exact numbers

Test name	Executions per second
✓ copyWithin()	12,637,405 Ops/sec
splice()	9,527,260 Ops/sec

Script Preparation code:

var colors = ["red", "blue"];
var index = 1;
var value = "white";

Tests:

splice()
colors.splice(index, 0, "white"); colors.splice(index, 1)
copyWithin()
colors.length++; colors.copyWithin(index + 1, index); colors[index] = value; colors.splice(index, 1)