Linux.com: Lighttpd Can Lighten Apache's Load Feb 9, 2006, 05 :30 UTC (0 Talkback[s]) (8401 reads) (Other stories by Robert W. Oliver II)
"Is your Apache Web server slowing down under the weight of streaming media content or database-driven applications? Lighttpd, sometimes pronounced 'Lighty,' is a lightweight HTTP server that can help alleviate Apache's load by serving static content or CGI scripts. Since Lighttpd uses fewer resources per request than Apache alone, it can generally serve most static content faster than Apache. It also benefits from an actively developed FastCGI interface that performs true load balancing, giving you all the performance benefits of compiled into Apache modules such as PHP.
"One of the most beautiful things about using Lighttpd is that you can run it behind Apache via Apache's proxy module. This means you don't need to add another physical server in order to use it..."