tips.md

Useful Rust tips

Restart cargo on on change

cargo install cargo-watch cargo watch -x run

Minimize Rust Binaries

Release build

cargo build --release

Strip symbols from binary

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

Optimize build for size

# Cargo.toml
[profile.release]
opt-level = "s"

Link time optimization

Warn: Longer linking time

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

Compile time optimization

Warn: Longer compile time

# Cargo.toml
[profile.release]
codegen-units = 1

---

Get binary information about crates size share

Note: binary must contain symbols (strip = false) cargo build --release cargo bloat --release --crates

---

Threads (and memory) under control

Bulding and especially testing can depleat memory and froze the OS. Limiting maximum used threads can avoid this.

Building with thread limit

# limit building to 4 threads
cargo build -j 4
# or
cargo build --jobs 4

Testing with thread limit

# limit testing to 4 threads
cargo test -j 4
# or
cargo test --jobs 4