What to read, but it is better to look at code optimization?

Question

PHP

A couple of years ago I watched a report, if I’m not lying, the speaker from mail ru, he talked about the fact that when php executes, for example, a request to a database, then most of the time it waits for a response, and while waiting it takes CPU time and here they are, as I remember , wrote an extension in C so that the script does not take up CPU time while waiting, and at the end they said that in python, go and nodejs this moment is optimized. I've been looking for this video for 5 days now. Could you please provide a link to this video or something similar or advise what to read on this issue?

Answer 1

если вам именно php надо , то есть reactphp