Benchmark: JavaScript spread operator vs Slice/Splice performance

JavaScript spread operator vs Slice/Splice performance (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 vs Array removal with spread operator vs Array removal with slice and splice vs Array update with spread operator vs 'Array update with slice and assign

Created: 5 years ago by: Guest

Jump to the latest result

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);
Array removal with spread operator
const clone = [ ...list.slice(0, index), ...list.slice(index + 1), ];
Array removal with slice and splice
const clone = list.slice(); clone.splice(index, 1);
Array update with spread operator
const clone = [ ...list.slice(0, index), n, ...list.slice(index + 1), ];
'Array update with slice and assign
const clone = list.slice(); clone[index] = 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
Array removal with spread operator
Array removal with slice and splice
Array update with spread operator
'Array update with slice and assign

Fastest: N/A

Slowest: N/A

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

Created: 5 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

Array removal with spread operator

Array removal with slice and splice

Array update with spread operator

'Array update with slice and assign

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

No previous run results