Spinel, a Ruby AOT compiler, converts Ruby code into standalone native executables with 11.6x speedups over CRuby. It uses whole-program type inference to generate optimized C code, eliminating runtime dependencies. The compiler is self-hosting, written in Ruby and compiling itself into a native binary.

Benchmarks show 86.7x faster execution for Conway's Game of Life and 74.8x for Ackermann's function. Key optimizations include value-type promotion, loop-invariant hoisting, and dead-code elimination. Real-world programs like JSON parsing and ray tracing achieve 10x+ speedups.

The tool supports core Ruby features, bigint math, and cooperative fibers, with zero runtime overhead for value types. Spinel's one-command workflow and warning-free builds make it a practical choice for high-performance Ruby applications.