performance enhance: possible substitution of posix select inside event subsriber with epoll or libiouring

example: i am currently running a tango server with 50 device servers and a total of 1000 attributes. The 1000 attributes are polled every second with a single python process (event subscription). This process requires ~0.3 single cpu core seconds per second. a python-spy reveals that most of the cpu time is spent in the select of the event subsriber:

This load can possibly be reduced by substitution of the select with another technology, like epoll / libiouring. suggestion to use libiouring as this seem to yield the best performance lately.