Simon Willison’s Weblog

22nd December 2007 - Link Blog

Speeding up dateutil: Python's heapq module turns minutes into seconds. Neat case study in data structure optimisation.

Posted 22nd December 2007 at 1:07 pm

Recent articles

Can coding agents relicense open source through a “clean room” implementation of code? - 5th March 2026
Something is afoot in the land of Qwen - 4th March 2026
I vibe coded my dream macOS presentation app - 25th February 2026

This is a link post by Simon Willison, posted on 22nd December 2007.

brian-beck 2 data-structures 6 dateutil 2 heapq 1 python 1230

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