[Solved] 30 secs to compile 1200 lines of code?

[kornel]

Try -Z time-passes flag:

Slow compile times?

That was with gcc. I actually just tried with clang, and it's about twice as fast at 3 seconds. cargo check is indeed a lot faster, at 60 seconds on the nightly compiler. Thanks for pointing that out. So I did cargo rustc -- -Z time-passes with the nightly compiler, and the results are enlightening: time: 0.067 parsing time: 0.000 recursion limit time: 0.000 crate injection time: 0.000 plugin loading time: 0.000 plugin registration time: 5.917 expansion time: 0.000 maybe buildin…