For benchmarks we have a separate project on the GH: [1] -- you can run the benchmarks on a Linux box pretty easily. Here's an example output: [2]

[1] https://github.com/MagicStack/vmbench [2] http://magic.io/blog/uvloop-blazing-fast-python-networking/t...

Not sure what you mean, the benchmark section lists ~40k packets/s for nodejs and asyncio, ~100k for uvloop (for 1KiB packages, similar difference for 10 and 100 KiB) - and ~20k req/s for nodejs, and ~37k for uvloop w/httptools. Interestingly, uvloop pulls ahead for 100KiB request size for the http case.

The benchmark (simple echo server) results were right there in the blog post:

http://magic.io/blog/uvloop-blazing-fast-python-networking/t...

Building on to this, how does it compare to raw libuv in c?Personally, I'm not surprised that python (especially cython) is faster than node in this case, but I still need to see how much less overhead there is to node.

> Building on to this, how does it compare to raw libuv in c?

Building something in C is very hard. uvloop wraps all libuv primitives in Python objects which know how to manage the memory safely (i.e. not to "free" something before libuv is done with it). So development time wise, uvloop is much better.

As for the performance, I guess you'd be able to squeeze another 5-15% if you write the echo server in C.

> I'm not surprised that python (especially cython) is faster than node in this case

Cython is a statically typed compiled language, it can be anywhere from 2x to 100x faster than CPython.

>So development time wise, uvloop is much better.

Yeah, I definitely get that. I'm just trying to see the smaller picture here.

>Cython is a statically typed compiled language, it can be anywhere from 2x to 100x faster than Python.

Ah, my bad for not knowing the difference between Cython and CPython. It seems to me, then, that this isn't really a fair comparison to node, is it? Naturally a statically typed language is going to be faster than a dynamic one. Good on you for including a comparison with Go, though.

> It seems to me, then, that this isn't really a fair comparison to node, is it?

Isn't node written in C?

Yes, but JavaScript is still a dynamic, garbage collected language.

Most of nodejs internals are in C++ on top of libuv. Only a thin layer of JS interfaces wrap that.

Python is also a dynamic, GCed language. uvloop is built with Cython, which uses the Python object model (and all of its overhead!), and CPython C-API extensively (so it's slower than a pure C program using libuv).

I think the uvloop package is written in Cython, but the benchmarks just use Python.