[php-src] Issue #9782: Share opened socket between two processes setializing it to memory pointer?

Issue: https://github.com/php/php-src/issues/9782 Author: 6562680 ### Description Could we receive benefit from fread() loop cycle that never interrupts with parsing stuff, and fwrite cycle that just writes immediate from the buffer, and all of them in diferrent processes? Old in php we must writin while loop that fread from socket by one chunk, then does something, then writes back? I heard 3rd time that correct work with sockrts is several processor threads one does readin, one writing and one is processing. Could the same effect be enstablished using stream_select in while cycle? I mean call stream select worked exactly for given timeout, or working in background, but timeout is for check redults?