Does anyone have good resources / online manuals on how to investigate code size?

I know of cargo-bloat

Does anyone have good resources / online manuals on how to investigate code size?

https://github.com/johnthagen/min-sized-rust
https://lifthrasiir.github.io/rustlog/why-is-a-rust-executable-large.html
https://github.com/RazrFalcon/cargo-bloat

Okay, I did some measurements.

rustpython commit: 9e194b3
Date: 2019-06-26
cargo version: 1.35.0
rustc version: 1.35.0
toolchain: stable-x86_64-unknown-linux-gnu
os: archlinux

First build in release mode:

cargo --release
target/release/rustpython = 11236832 bytes (11 MB)

Enable LTO (link time optimization) in Cargo.toml

# Cargo.toml
[profile.release]
lto = true

cargo --release
target/release/rustpython = 9387840 bytes (9 MB)

Run strip on the lto build:

target/release/rustpython = 7678664 bytes (7.6 MB)

Oh wow, that's a lot better!

Probably this issue can be closed now ;) @windelbouwman

For now,

• linux: 11MB
• macos: 14MB
• windows: 16MB

The size is still too large for our use case, I suppose we can continue the discussion in this issue: #4203