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Doods

Auto debloat unused `pub` items from dependencies.

infosec.pub/post/22773873

infosec.pubAuto debloat unused `pub` items from dependencies. - Infosec.PubI shaved off 10 MiB from my binary in 2 hours. I made a program using Macroquad [https://macroquad.rs/], 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 [https://crates.io/crates/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.
#rust
Public
Soso

@Doods are you using `release` ? If you want the best dead-code elimination, you can also enable Link time optimisations (LTO): doc.rust-lang.org/cargo/refere

doc.rust-lang.orgProfiles - The Cargo Book
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Doods

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 = true

cargo build --release

Soso

@Doods I'm surprised you can gain that much with that already enabled!

23 janv. 2025, 18:07·Public·Web
0boost·0favori
Public
Doods

Should I bring it up to ‘min-sized-rust’ working group or the forums or something?

Public
laund [old account, moved]

@sgued @Doods really makes me wonder how much smaller binaries can be if this is the case currently...

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