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A gradually typed Ruby subset compiler with Hindley-Milner type inference, dual LLVM/JVM backends, and seamless Java interop.
7 starsRuby
Konpeito – A gradually typed Ruby compiler with LLVM/JVM backends
by i2y·Feb 17, 2026·1 point·0 comments
AI Analysis
●●SolidWizardryBig Brain
Crystal-like typing for Ruby with fallback to dynamic dispatch—genuine compiler, still early.
Strengths
- •Hindley-Milner inference eliminates annotation burden for most code, matching Crystal's UX
- •Dual backends (LLVM + JVM) with seamless Java interop solve real deployment friction
- •Gradual typing philosophy is correct: static where possible, dynamic where necessary, compiler shows boundaries
Weaknesses
- •Requires Ruby 4.0+ (not widely available yet) and either LLVM 20 or Java 21 setup overhead
- •Only 2 stars, no public benchmarks or real-world projects—unclear if performance gains justify compile-time overhead
Category
Target Audience
Ruby developers seeking type safety and performance without full rewrite, systems programmers
Similar To
Crystal · GraalVM · Sorbet
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