Benchmark: JavaScript spread operator vs Slice/Splice performance - 2

Script Preparation code:

const ITERATIONS = 500000;
var index = ITERATIONS/2;
var n = Math.random();

var list = [];
for (let i = 0; i < length; i += 1) {
  list.push(Math.random());
}

Tests:

Array clone with spread operator
const clone = [...list];
Array clone with slice
const clone = list.slice();
Array addition with spread operator
const clone = [...list, n];
Array addition with slice and push
const clone = list.slice(); clone.push(n);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Array clone with spread operator
Array clone with slice
Array addition with spread operator
Array addition with slice and push

Fastest: N/A

Slowest: N/A

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Latest run results:

Run details: (Test run date: 2 days ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/123.0.0.0 Safari/537.36

Browser/OS: Chrome 123 on Mac OS X 10.15.7

View result in a separate tab

Test name	Executions per second
Array clone with spread operator	17613130.0 Ops/sec
Array clone with slice	25772080.0 Ops/sec
Array addition with spread operator	10510310.0 Ops/sec
Array addition with slice and push	9356765.0 Ops/sec

JavaScript spread operator vs Slice/Splice performance - 2 (version: 0)

Comparing performance of: Array clone with spread operator vs Array clone with slice vs Array addition with spread operator vs Array addition with slice and push

Created: 4 years ago by: Guest

Jump to the latest result

Array clone with spread operator

Array clone with slice

Array addition with spread operator

Array addition with slice and push

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A