GoKawiilDeveloper builds buildprof tool to investigate Bun's Rust vs Zig compile speeds
A developer created an open-source tracing tool called buildprof that visualizes where time goes during software compilation on Linux, mapping every process and subprocess onto a single timeline. The project was sparked by a claim from Bun architect Jarred Sumner that Bun's new Rust build compiled over 5 times faster on Linux than its previous Zig build, a result the developer found suspicious given that the two builds used different link-time optimization settings—Full LTO for Zig versus ThinLTO for Rust.