I shaved off 10 MiB from my binary in 2 hours!
I made a program using Macroquad, then I built it in release mode, the binary was 63 MiB in size.
So I used cargo vendor to have a better look at Macroquad and one of its dependencies, glam.
I then started to delete code, like, lots and lots of code(about 30_000 lines of code); none of it affected my main project, some of it became ‘dead_code’ just by removing the pub keyword.
The result is that my project was unaffected and the binary went down to 52 MiB.
Is there a way to automate removal of unneeded elements from dependencies? This is potentially huge.
Yes, I am using both LTO and release mode, I can show you:
[profile.release] opt-level = 3 codegen-units = 1 panic = "abort" strip = true lto = truecargo build --release@Doods I’m surprised you can gain that much with that already enabled!
Should I bring it up to the ‘min-sized-rust’ working group or the forums or something?
Yes. This behavior seems strange, so either an explanation or investigation by a compiler dev seems like it would be helpful.