I just meant that one way to make threads "work" is to use IO, so I assumed the OP did a trick along those lines. Basically two threads can receive data or read

I just meant that one way to make threads "work" is to use IO, so I assumed the OP did a trick along those lines. Basically two threads can receive data or read from disk a the same time. Same thing can be accomplished with a select/epoll setup but threads would just be less lines of code. Otherwise another trick is to identify a call which uses extensions or releases the GIL once it goes into C.