Here’s my Mac ~/.cargo/config:
[build]
# Use CPU family specific instructions for faster machine code.
rustflags=["-C", "target-cpu=native"]
[profile.dev]
split-debuginfo = "unpacked" # macOS-specific debug build acceleration.
[profile.release]
lto = true # Turn on link time optimization (more optimizations)
codegen-units = 1 # Reduce LTO units to 1 for maximum binary size reduction.
opt-level = 3 # Optimize for speed (not binary size).
# If you are on a M1 Mac
[target.x86_64-apple-darwin]
rustflags = [
"-C", "link-arg=-undefined",
"-C", "link-arg=dynamic_lookup",
]
This definitely makes the final linking phase much slower but I’ve had benchmarks in the past and the code is little bit faster indeed (and the binary size smaller).
