Currently only a fraction of all available ØMQ sockets are supported. This because I determined that most of the sockets were deprecated.
To do so, I implemented every socket type (except REQ and REP)
and tested their functionality and their performance. A socket type
had to either offer exceptional performance in some domain or offer
a unique feature.
Turns out that you can replace all those deprecated
socket types in terms of functionality using only Client,
Server, Dish and Radio.
To test performance I wrote a benchmark using criterion that tested every basic
socket pattern (PUSH-PULL, EXCLUSIVE PAIR, etc.). I used a sample size of
50m messages per messages size of 10, 50 and 100 bytes, per pattern.
I determined that the thread safe type had equal or better single thread
performance in almost ALL cases. The only exception was the EXCLUSIVE PAIR
pattern which is used exclusively for inter-thread communication, where
you should probably be be using something like crossbeam_channel, which offers
significantly better performance.
Lastly these deprecated socket types had a ton of footguns that were kept to maintain backward compatibility.
If you still think your favorite socket type should be supported, feel free to open and issue as this is only my subjective opinion.