Yet another attempt at typed JS data

Bergi a.d.bergi at web.de
Mon Feb 10 19:27:05 UTC 2020


Hello!

> Unfortunately, `Array.from({ length: 4 }, () => whatever)` produces a holey
> array

Does it? But really, if the performance difference betweeen HOLEY and
PACKED arrays were large enough to be relevant[1], the engine
programmers would certainly already have optimised all those trivial
cases where an array is filled gradually to produce the more efficient
representation.

kind regards,
 Bergi

[1]: it probably isn't:
https://stackoverflow.com/questions/54481918/#comment95848513_54485509


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