Run results for: flatMap vs reduce with spread vs reduce with push vs for of vs push ... - MeasureThat.net

Run details:

User agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:128.0) Gecko/20100101 Firefox/128.0

Browser: Firefox 128

Operating system: Ubuntu

Device Platform: Desktop

Date tested: 2 months ago

Test name	Executions per second
reduce with spread	3.0 Ops/sec
flatMap	4727.0 Ops/sec
reduce with push	14412.6 Ops/sec
for...of	14940.9 Ops/sec
push(...arr)	41584.4 Ops/sec

Website performance monitoring

Script Preparation code:

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

Tests:

reduce with spread
arr.reduce((acc, x) => [...acc, x], [])
flatMap
arr.flatMap(x => [x])
reduce with push
arr.reduce((acc, x) => { acc.push(x); return acc; }, [])
for...of
const acc = [] for (const x of arr) { acc.push(x); }
push(...arr)
const acc = [] acc.push(...arr);