Simon Willison’s Weblog

Content delivery system design mistakes. Collection of tips for optimising Web server performance. Mentions lighttpd/nginx, Keep-Alive, expires headers, noatime and more.

Posted 15th February 2007 at 11 am

Recent articles

My review of Claude's new Code Interpreter, released under a very confusing name - 9th September 2025
Recreating the Apollo AI adoption rate chart with GPT-5, Python and Pyodide - 9th September 2025
GPT-5 Thinking in ChatGPT (aka Research Goblin) is shockingly good at search - 6th September 2025

http 97 lighttpd 5 nginx 39 performance 92

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