Comment by richmarr
11 years ago
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:
https://blog.codinghorror.com/the-sad-tragedy-of-micro-optim...
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.