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0 pointsrichmarr10y ago0 comments

Array performance isn't always better than string concatenation.

In this test case it comes out slower: https://jsperf.com/left-pad-arrays/3

But ultimately it doesn't matter in the least for 99.9% of use cases:

0 comments

Interesting - well I thought if it is being used by thousands of libraries it might be worth optimizing.

I just tried in NodeJS, you could also just instantiate an Array of a given length and join it with spaces, like this.

var x = new Array(5);x[4] = "abc";x.join(" ");

No idea if it could be faster - but the test you linked to pushes spaces into the Array.

j / k navigate · click thread line to collapse

Interesting - well I thought if it is being used by thousands of libraries it might be worth optimizing.

I just tried in NodeJS, you could also just instantiate an Array of a given length and join it with spaces, like this.

var x = new Array(5);x[4] = "abc";x.join(" ");

No idea if it could be faster - but the test you linked to pushes spaces into the Array.

j / k navigate · click thread line to collapse