performance about url.parse in Nodejs

I just traced my nodejs server's performance by using: siege -b -t10s -q http://mynodejsserver

I found that when there was no "url.parse(req.url)"

Transaction rate was about 4300 trans/sec

but when i used url.parse, transaction rate was about 3600-3700 trans/sec

The other code is the same.

I tried them many times, and the result was stable.

Does the url.parse really have the performance problem?

Solution

YES

Yes, in the techempower benchmarks node.js went from 20k/s to 30k/s when removing url.parse.

The implementation is very slow like most node.js modules (I have rewritten 3x-75x speed improvements on several "de facto standard" node modules, just check my github profile).

I have actually planned a url.parse rewrite too. But yes, if you can avoid it then you should avoid it.

Update

This fixes the performance problem: https://npmjs.org/package/fast-url-parser . It has exactly same api and semantics but it is 25-30x faster and would not affect the transaction rate at all in your example.