jevopt: smarter compiler inlining

1.1K views on X · checked Sep 26, 2026

Can Jev optimise the size of compiled binaries better than clang -Oz? Turns out it can (sometimes)! Introducing jevopt: making intelligent compiler optimisation decisions with Jev. I used Jev to make intelligent inlining decisions at each LLVM IR call-site. Here’s how I did it.