Run results for: reduce.concat() vs flat() vs concat()

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/16.4 Safari/605.1.15

Browser: Safari 16

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 2 years ago

Benchmark engine: Benchmark.js

reduce + Array.prototype.concat

14.9M/s

concat using decomposition

9.3M/s

Array.prototype.flat

7.8M/s

View exact numbers

Test name	Executions per second
✓ reduce + Array.prototype.concat	14,910,420 Ops/sec
concat using decomposition	9,287,406 Ops/sec
Array.prototype.flat	7,765,278 Ops/sec

Tests:

reduce + Array.prototype.concat
var params = [[ 1, 2 ], [ "hello", true, 7 ]]; var other = params.reduce((acc, val) => acc.concat(val), []);
Array.prototype.flat
var params = [[1, 2, params], [ "hello", true, 7 ]]; var other = params.flat();
concat using decomposition
var params = [[ 1, 2 ], [ "hello", true, 7 ]]; var other = [].concat(...params);