Run results for: flatMap vs reduce with desctructuring vs reduce without desctructuring

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/119.0.0.0 Safari/537.36

Browser: Chrome 119

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 2 years ago

Test name	Executions per second
reduce with concat without destructuring	2.6 Ops/sec
flatMap	1286.6 Ops/sec
reduce with concat with destructuring	15.4 Ops/sec

Script Preparation code:

var arr = Array(10_000).fill(0)

Tests:

reduce with concat without destructuring
arr.reduce((acc, x) => acc.concat(x).concat(x), [])
flatMap
arr.flatMap(x => [x, x])
reduce with concat with destructuring
arr.reduce((acc, x) => [...acc, x, x], [])