DEV Community

Discussion on: Please don't "overchain" array methods

Collapse
richardpringle profile image
Richard Pringle

What are you talking about. The time complexity doesn't change by moving everything into the reducer, it's the space complexity that changes because .map creates a new array. It's not 1ms vs 3ms...

Thread Thread
okdewit profile image
Orian de Wit • Edited

You are right that it doesn't take three times as long, my mistake.

But it's never just "1+1+1=3" either.

Especially if the arrays are large, and the operations are simple, then the overhead of copying the array doesn't just affect memory use, it also takes longer.