picohttpparser VS liburing

Yea, it is definitely a fake HTTP server which I acknowledge in the article [1]. However based on the size of the requests, and my observation of the number of packets per second being symmetrical at the network interface level, I didn't have a concern about doubled responses.

Skipping the parsing of the HTTP requests definitely gives a performance boost, but for this comparison both sides got the same boost, so I didn't mind being less strict. Seastar's HTTP parser was being finicky, so I chose the easy route and just removed it from the equation.

For reference though, in my previous post[2] libreactor was able to hit 1.2M req/s while fully parsing the HTTP requests using picohttpparser[3]. But that is still a very simple and highly optimized implementation. From what I recall when I played with disabling HTTP parsing in libreactor I got a performance boost of about 5%.

1. https://talawah.io/blog/linux-kernel-vs-dpdk-http-performanc...

2. https://talawah.io/blog/extreme-http-performance-tuning-one-...

3. https://github.com/h2o/picohttpparser

Just-js is not nodejs framework. It's sperate runtime and most of the http code is written using c/c++ (for example headers parsing logic is written using c and is using https://github.com/h2o/picohttpparser which is c library)

I've tinkered around with io_uring on and off for the last couple years. But I think it's really becoming quite cool (not that it wasn't cool before... :)). This was a really interesting post on what's new https://github.com/axboe/liburing/wiki/io_uring-and-networki.... The combination of ring-mapped buffers and multi-shot operations has some really interesting applications for high-performance networking. Hoping over the next year or two we can start to see really bleeding edge networking perf without having to resort to using DPDK :)

Thought I was doing something wrong at first, but after looking at examples and code, I just wasn't able to reach the epoll numbers. Looking on the Github page, there a few issues there with people who found the same thing, with their own examples. #1, #2

To address my own silly questions, yes, one should use the new fixed buffers described in this document: https://github.com/axboe/liburing/wiki/io_uring-and-networki...

We're working on this! https://github.com/axboe/liburing/issues/830

Link: https://github.com/axboe/liburing/wiki/io_uring-and-networking-in-2023