https://en.algorithmica.org/hpc/ https://en.algorithmica.org/hpc/ and http://0x80.pl/ http://0x80.pl/ have some stuff about this, but the latter can be dense. I

https://en.algorithmica.org/hpc/ https://en.algorithmica.org/hpc/ and http://0x80.pl/ http://0x80.pl/ have some stuff about this, but the latter can be dense. I've had fun getting my hands dirty with some problems at https://highload.fun/ https://highload.fun/ but there's not much direction unless you go to the telegram chat and ask people questions.