goroutine vs tokio

February 16, 2022

Reddit讨论贴 Go uses a different strategy for blocking systemcalls. It does not run them on a threadpool - it moves all the other goroutines that are queued to run on the current thread to a new worker thread, then runs the blocking systemcall on the current thread. This minimizes context switching. You can do this in tokio as well, using task::block_in_place. If I change your code to use that instead of tokio::fs, it gets a lot closer to the go numbers. ...