The next release of #swad will probably bring not a single new feature, but focus on improvements, especially regarding #performance. Support for using #kqueue (#FreeBSD et al) to handle #signals is a part of it (which is done and works). Still unsure whether I'll also add support for #Linux' #signalfd. Using kqueue also as a better backend for #timers is on the list.

Another hopefully quite relevant change is here:

https://github.com/Zirias/poser/commit/798f23547295f89fa0c751f0e707c3474b5c689c

In short, so far my #poser lib was always awaiting readiness notification (from kqueue, or #epoll on Linux, or select/poll for other platforms) before doing any read or write on a socket. This is the ideal approach for reads, because in the common case, a socket is NOT ready for reading ... our kernel must have received something from the remote end first. But for writes, it's not so ideal. The common case is that a socket IS ready to write (because there's space left in the kernel's send buffers). So, just try it, and only register for notifications if it ever fails, makes more sense. Avoids pointless waiting and pointless events, and e.g. with epoll, even unnecessary syscalls. 😉

Still working on #swad, and currently very busy with improving quality, most of the actual work done inside my #poser library.

After finally supporting #kqueue and #epoll, I now integrated #xxhash to completely replace my previous stupid and naive hashing. I also added a more involved #dictionary class as an alternative to the already existing #hashtable. While the hashtable's size must be pre-configured and collissions are only ever resolved by storing linked lists, the new dictionary dynamically nests multiple hashtables (using different bits of a single hash value). I hope to achieve acceptable scaling while maintaining also acceptable memory overhead that way ...

#swad already uses both container classes as appropriate.

Next I'll probably revisit poser's #threadpool. I think I could replace #pthread condition variables by "simple" #semaphores, which should also reduce overhead ...

https://github.com/Zirias/swad

#c #coding