Simon Willison’s Weblog

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

First impressions of Claude Cowork, Anthropic's general agent - 12th January 2026
My answers to the questions I posed about porting open source code with LLMs - 11th January 2026
Fly's new Sprites.dev addresses both developer sandboxes and API sandboxes at the same time - 9th January 2026

brian-beck 2 data-structures 6 dateutil 2 heapq 1 python 1220

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