Simon Willison’s Weblog

28th June 2009 - Link Blog

Twitter, an Evolving Architecture. The most detailed write-up of Twitter’s current architecture I’ve seen, explaining the four layers of cache (all memcached) used by the Twitter API.

Posted 28th June 2009 at 3:09 pm

Recent articles

GLM-5.2 is probably the most powerful text-only open weights LLM - 17th June 2026
Publishing WASM wheels to PyPI for use with Pyodide - 13th June 2026
Claude Fable is relentlessly proactive - 11th June 2026

This is a link post by Simon Willison, posted on 28th June 2009.

caching 49 memcached 33 twitter 161 software-architecture 25

Monthly briefing

Sponsor me for $10/month and get a curated email digest of the month's most important LLM developments.

Pay me to send you less!

Sponsor & subscribe