feat: better release mode

Cargo.toml

@@ -25,3 +25,26 @@ path = "src/bin/copyrat.rs"
 [[bin]]
 name = "tmux-copyrat"
 path = "src/bin/tmux_copyrat.rs"
+
+[profile.release]
+# Enable link-time optimization (LTO). It’s a kind of whole-program or
+# inter-module optimization as it runs as the very last step when linking the
+# different parts of your binary together. You can think of it as allowing
+# better inlining across dependency boundaries (but it’s of course more
+# complicated that that).
+#
+# Rust can use multiple linker flavors, and the one we want is “optimize across
+# all crates”, which is called “fat”. To set this, add the lto flag to your
+# profile:
+lto = "fat"
+
+# To speed up compile times, Rust tries to split your crates into small chunks
+# and compile as many in parallel as possible. The downside is that there’s
+# less opportunities for the compiler to optimize code across these chunks. So,
+# let’s tell it to do one chunk per crate:
+codegen-units = 1
+
+# Rust by default uses stack unwinding (on the most common platforms). That
+# costs performance, so let’s skip stack traces and the ability to catch panics
+# for reduced code size and better cache usage:
+panic = "abort"

Makefile

@@ -0,0 +1,2 @@
+release:
+	RUSTFLAGS="-Ctarget-cpu=native" cargo build --release