Benchmark: Array concat vs spread operator vs push vs Splice

Tests:

Array.prototype.concat
var params = [ "hello", true, 7 ]; var other = [ 1, 2 ].concat(params);
spread operator
var params = [ "hello", true, 7 ] var other = [ 1, 2, ...params ]
Push
var params = [ "hello", true, 7 ]; var other = [ 1, 2 ].push(...params);
Splice
var params = [ "hello", true, 7 ]; var other = params.splice(params.length, 0, ...params);

Historical Performance Data aggregated from 8 community runs

Desktop Results:

Chrome 8 runs

Push

55.0M/s

spread operator

46.2M/s

Splice

18.3M/s

Array.prototype.concat

11.3M/s

Fastest: Push (4.9x faster)

View exact numbers

✓ Push: 55,008,176 ops/sec
• spread operator: 46,198,312 ops/sec
• Splice: 18,304,464 ops/sec
• Array.prototype.concat: 11,319,277 ops/sec

Results show median performance across all community submissions. Run this benchmark yourself to verify on your device.

Test case name	Result
Array.prototype.concat
spread operator
Push
Splice

Latest run results:

Run details: (Test run date: 11 months ago)

User agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/140.0.0.0 Safari/537.36

Browser/OS: Chrome 140 on Linux

View result in a separate tab

Push

42.2M/s

spread operator

38.3M/s

Splice

12.1M/s

Array.prototype.concat

9.3M/s

View exact numbers

Test name	Executions per second
✓ Push	42,206,416 Ops/sec
spread operator	38,276,240 Ops/sec
Splice	12,092,990 Ops/sec
Array.prototype.concat	9,294,956 Ops/sec

Array concat vs spread operator vs push vs Splice (version: 0) Benchmark.js

Compare the new ES6 spread operator with the traditional concat() method and push

Comparing performance of: `Array.prototype.concat vs spread operator vs Push vs Splice`

Created: 5 years ago by: Guest

Go to the latest result

Array.prototype.concat

spread operator

Push

Splice

Historical Performance Data aggregated from 8 community runs

Desktop Results:

Chrome 8 runs

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

Array concat vs spread operator vs push vs Splice (version: 0) Benchmark.js

Compare the new ES6 spread operator with the traditional concat() method and push

Comparing performance of: Array.prototype.concat vs spread operator vs Push vs Splice

Created: 5 years ago by: Guest

Go to the latest result

Array.prototype.concat

spread operator

Push

Splice

Historical Performance Data aggregated from 8 community runs

Desktop Results:

Chrome 8 runs

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

Related benchmarks

Comparing performance of: `Array.prototype.concat vs spread operator vs Push vs Splice`