Static Type Analysis for Ruby Without Type Annotations

Shopify engineers have developed a novel static type analyzer that infers type information for Ruby programs without requiring type annotations. The analyzer leverages an improved Sparse Conditional Constant Propagation (SCCP) algorithm and precise dataflow tracking to efficiently handle interprocedural type analysis, completing analysis in seconds even for programs with a large number of classes. This research offers a new approach to optimizing compilers for dynamic languages and opens up new possibilities for performance improvements in dynamic languages like Ruby.