Benchmark: reduce.concat() vs flat() vs spread concat()

Tests:

reduce + Array.prototype.concat
var params = [[ "a", "b" ], [ "c", "d", "e" ]]; var other = params.reduce((acc, val) => acc.concat(val), []);
Array.prototype.flat
var params = [[ "a", "b" ], [ "c", "d", "e" ]]; var other = params.flat();
spread concat
var params = [[ "a", "b" ], [ "c", "d", "e" ]]; var other = ([]).concat(...params);

Rendered benchmark preparation results:

Previous results

Test case name	Result
reduce + Array.prototype.concat
Array.prototype.flat
spread concat

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Latest run results:

Run details: (Test run date: one year ago)

User agent: Mozilla/5.0 (Linux; Android 13; SM-G998U) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/96.0.4664.175 Mobile Safari/537.36

Browser/OS: Chrome Mobile 96 on Android

Test name	Executions per second
reduce + Array.prototype.concat	5714173.0 Ops/sec
Array.prototype.flat	940260.8 Ops/sec
spread concat	5712640.0 Ops/sec

reduce.concat() vs flat() vs spread concat() (version: 0)