Run results for: String reversal 2

Run details:

User agent: Mozilla/5.0 (X11; CrOS x86_64 14541.0.0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/126.0.0.0 Safari/537.36

Browser: Chrome 126

Operating system: Chrome OS 14541.0.0

Device Platform: Desktop

Date tested: 2 days ago

Test name	Executions per second
spread+toReversed+join	1117.5 Ops/sec
Array.from+toReversed+join	1149.9 Ops/sec
toReversed.call+join	348.8 Ops/sec
backwards function*	453.6 Ops/sec
Array.of	426.0 Ops/sec
Array	486.2 Ops/sec

Script Preparation code:

let string = Array.from({
    length: 50
}, (_, index) => index).join('')

function* backwards(iterable) {
    for (let {
            length
        } = iterable; length--;) yield iterable[length]
}

Tests:

spread+toReversed+join
for(let i = 300; i--;)var t = [...string].toReversed().join('')
Array.from+toReversed+join
for(let i = 300; i--;)var t = Array.from(string).toReversed().join('')
toReversed.call+join
for(let i = 300; i--;)var t = [].toReversed.call(string).join('')
backwards function*
for(let i = 300; i--;)var t = [...backwards(string)].join('')
Array.of
for(let i = 300; i--;)var t = Array.of(...string).toReversed().join('')
Array
for(let i = 300; i--;)var t = Array(...string).toReversed().join('')

Run results for: String reversal 2

spread+toReversed+join

Array.from+toReversed+join

toReversed.call+join

backwards function*

Array.of

Array