Broken Pipe

May 11, 2023

daybook, rust | permalink

I went down a little rabbit hole after getting a "broken pipe" error when trying to pipe the output of ts-cli to another program (head/tail). The short version of what I've learned is that repeatedly calling println! is not very performant and can cause this error. So what I'm going to do is stick all output into a String, locking a BufWriter on io::stdout, and writing to it with writeln! (and calling .ok() on it to ignore any errors). (I also tried using writeln! every time something needed to be printed, but this slows this down significantly. So both are needed - a single string and the lock/writeln! once. This is now done on the Summary command and pipes are working.