Benchmark: reduce.concat() vs flat() vs [].concat(...arr)

Tests:

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

Rendered benchmark preparation results:

Previous results

Test case name	Result
reduce + Array.prototype.concat + [].concat
Array.prototype.flat
[].concat

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Latest run results:

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

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/101.0.4951.64 Safari/537.36

Browser/OS: Chrome 101 on Mac OS X 10.15.7

Test name	Executions per second
reduce + Array.prototype.concat + [].concat	3254339.0 Ops/sec
Array.prototype.flat	934972.7 Ops/sec
[].concat	6568447.0 Ops/sec

reduce.concat() vs flat() vs [].concat(...arr) (version: 0)