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A comment on JavaScript Array.push is 945x faster than Array.concat. Parent comment

Re:JavaScript Array.push is 945x faster than Array.concat by Someone on Thursday May 23, 2019 @02:37PM (#19994553)
”It seems like this approach would require all arrays to be allocated with at least a page's worth of memory”

I don’t know whether it is done in practice, but you can postpone doing that until the array gets ‘big’, for some definition of ‘big’.

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