Because it would be hard for newcomers to find and read all of the meta questions about this topic, I suggest having a common post for all of them. It would be easier for moderators to point newcomers at a single post instead of multiple meta posts.
Related questions:
What is the best way to actually time an answer for fastest-code challenges
Would language restrictions for fastest-code problems be ok?
Is TIO acceptable for fastest-code questions?
Winning Criteria vs Valid Criteria
What are the requirements for writing a fastest-code challenge?
