JIT-Compiling a Stack Machine with SLJIT: A Tale of Optimization
2025-09-19
This post details the author's journey in implementing a JIT compiler for their stack-based uxn virtual machine using SLJIT. Initial attempts yielded minimal performance gains due to uxn's frequent dynamic jumps. However, through a series of optimizations—including refined calling conventions, stack caching, and register allocation strategies—a 30-46% speedup was achieved. The article meticulously documents the optimization process, challenges encountered, and debugging techniques, providing valuable insights for those interested in JIT compilation and optimizing stack-based virtual machines.
Development
stack machine