Factorials as C extension.

Active Support impelementation in C for the ones who need for speed.

A naive bayes text classification algorithm built in C++, with a Ruby interface using Rice

Fast Bit String to Ruby Arrays of IDs, using C for magical speediness. Perfect for use with Redis Bit sets

an attempt at a fast_blank for JRuby

Memory-efficient scalable Bloom Filter that grows dynamically. No upfront capacity needed. 20-50x less memory than Set, perfect for Rails apps.

Native C implementation of #combine function used by rom-rb.

A high-performance C extension that tracks which Ruby source files are executed during test runs, enabling test impact analysis.

High-performance CUID2 (Collision-resistant Unique ID) generator implemented in C for maximum speed while maintaining cryptographic security.

Parallel HTTP requests via libcurl curl_multi API. Releases GVL during I/O, compatible with Async gem and Fiber scheduler. Supports execute (all), first_execute (first N), stream_execute (yield as ready). Built-in retry functionality for network errors and custom HTTP status codes.

Haversine great-circle distance formula implemented as C extension

Faster Implementations of ActiveSupport Methods

Native Ruby extension to filter a list quickly.

Ruby wrapper around C matrices implementation

Retrieves the source code for a method (and its comment) and does it faster than any other existing solution

Serialize and deserialize Open Sound Control messages using rtosc

Ruby bindings for fastpbkdf2

Hash#slice implemented in C

Mongo on Speed

Minimal set of optimized string scanning methods for high-throughput workloads like log processing, CSV parsing, HTTP parsing, and text analytics. Pure C implementation with no external dependencies.