array-fill-map

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Testing in
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Fill '' then map 
Array(100).fill('').map((e, i) => i + i);
ready
Fill null then map
Array(100).fill(null).map((e, i) => i + i);
ready
Array.from
Array.from({ length: 100 }, (e, i) => i + i)
ready
Array.apply then map
Array.apply(null, Array(100)).map((e, i) => i + i)
ready
Spread then map
[...Array(100)].map((e, i) => i + i)
ready
Spread keys then map
[...Array(100).keys()].map(e => e + e)
ready
Spread repeated string then map
[...'x'.repeat(100)].map((e, i) => i + i)
ready

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