psyirius / uWebSockets

Highly efficient cross-platform WebSocket & HTTP library for C++11 and Node.js

uWebSockets

µWS is one of the most lightweight, efficient & scalable WebSocket & HTTP server implementations available. It features an easy-to-use, fully async object-oriented interface and scales to millions of connections using only a fraction of memory compared to the competition. While performance and scalability are two of our top priorities, we consider security, stability and standards compliance paramount. License is zlib/libpng (very permissive & suits commercial applications).

• Autobahn tests all pass.
• Significantly outperforms WebSocket++, libwebsockets, Beast, Crow, Gorilla, Kaazing Gateway, ws and Socket.IO in every tested dimension (see benchmark table below).
• Outperforms Apache, Node.js, NGINX by at least 4x in HTTP requests per second.
• Linux, OS X & Windows support.
• Valgrind / AddressSanitizer clean.
• Built-in load balancing and multi-core scalability.
• SSL/TLS support & integrates with foreign HTTPS servers.
• Permessage-deflate built-in.
• Node.js binding exposed as the well-known ws interface (uws is at least 20x faster and 20x more scalable).