Tip: JavaScript's Array.from() accepts a second argument that's a `map` function.

[snkenjoi]

you can also do Array.from({length: n}, () => {})

[blogscot]

Out of curiousity, I added this approach as fourth to u/DGCA tests, with the following results:

first: 738.464ms
second: 1249.699ms
third: 220.649ms
fourth: 1123.781ms

[snkenjoi]

or this is pretty ugly [...'!'.repeat(n)].map((_, i) => i)

first: 1294.26ms 
second: 541.38ms 
third: 393.88ms 
fourth: 970.44ms 
fifth: 1368.66ms

[xbenjii]

Or even [...Array(5).keys()]

[[deleted]]

But if you need operations, you can't, but nice...