Top 3 c-extension Open-Source Projects

bottleneck

1 1,006 3.5 Python

Fast NumPy array functions written in C (by pydata)
nokolexbor

4 156 5.5 Ruby

High-performance HTML5 parser for Ruby based on Lexbor, with support for both CSS selectors and XPath.

Project mention: Ruby 3.3's YJIT: Faster While Using Less Memory | news.ycombinator.com | 2023-12-18

Yes, we ended up replacing Nokogiri by Nokolexbor, our own port of lexbor parser with like almost full compatibility with Nokogiri APIs while being around 5x faster: https://github.com/serpapi/nokolexbor

InfluxDB

www.influxdata.com featured

Power Real-Time Data Analytics at Scale. Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.
php_toml

1 1 3.2 PHP

PHP C-Extension to parse a TOML formatted string, and return its equivalent array structure

NOTE: The open source projects on this list are ordered by number of github stars. The number of mentions indicates repo mentiontions in the last 12 Months or since we started tracking (Dec 2020).