Product
Update 6: nginx_http_push_module. Turn nginx into a long-polling message queuing HTTP push server. Update 5: In Load Balancer Update Barry describes how WordPress.com moved from Pound to Nginx and are now "regularly serving about 8-9k requests/second and about 1.2Gbit/sec through a few
Product
Lighttpd (pronounced "lighty") is a web server which is designed to be secure, fast, standards-compliant, and flexible while being optimized for speed-critical environments. Its low memory footprint (compared to other web servers), light CPU load and its speed goals make lighttpd suitable for servers that are suffering load
Strategy
This paper is a great overview of different lightweight web servers. A lot of websites use lightweight web servers to serve images and static content. YouTube is one example: YouTube Architecture. So if you need to improve performance consider changing over a different web server for some types of content.