Fast Ruby is a collection of Ruby performance idioms and benchmarks that documents faster coding patterns.
The project addresses the challenge of writing performant Ruby code by collecting common idioms that can improve execution speed. It provides side-by-side code examples comparing slower and faster approaches across categories like arrays, hashes, strings, enumerables, and general Ruby patterns. Each idiom includes benchmark results generated using benchmark-ips, allowing developers to see concrete performance differences. The README emphasizes that these are contextual optimizations—the faster idiom is not universally applicable and should be chosen based on specific use cases.
Developers should use this resource when optimizing existing Ruby code or learning performance-conscious patterns. It suits projects where execution speed matters and developers want to understand which common patterns carry performance costs. The project recommends complementary tools like fasterer for static analysis that checks whether code follows the idioms documented here. The README explicitly cautions against blindly replacing one pattern with another, stressing that context determines whether an optimization is appropriate.
The project's development activity is dominated by suggestion-based contributions, indicating that the repository primarily grows through community proposals for new idioms to benchmark and document.
