miniblog.

I carefully document `cargo install --locked` for difftastic users, I carefully use `--locked` for CI, and I've just realised that all my release builds totally ignore it! Oops. Anyone using my prebuilt binaries have been getting different Unicode width calculations in display.

TIL that Rust's dbg! macro also works in release builds, so you can debug issues when you need the perf of a release build. This differs from debug_assert! which is ignored in release builds.

I originally heard about Cranelift in the context of fast rustc builds in debug mode. TIL it was originally written to make webassembly run faster! https://github.com/bytecodealliance/wasmtime/tree/main/cranelift (via https://hacks.mozilla.org/2018/10/webassemblys-post-mvp-future/)