Cranelift is the baseline JIT that powers Wasmtime and Fastly’s edge platform. Here is how it compiles WebAssembly quickly, what optimizations matter at the baseline tier, and where it fits next to LLVM and TurboFan.
How TurboFan turns hot JavaScript into optimized machine code using speculation, Sea of Nodes IR, and feedback-driven inlining — and why it has to bail out so often.
How QBE compiles SSA IR to machine code, with a close look at its linear-scan register allocator and the inline caching techniques production JITs use to recover lost megamorphic performance.
Explore how compilers replace hard-to‑predict branches with predicated instructions, the underlying hardware mechanisms, and real‑world performance results.