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

Running Python code in a sandbox with MicroPython and WASM - 6th June 2026
Claude Opus 4.8: "a modest but tangible improvement" - 28th May 2026
I think Anthropic and OpenAI have found product-market fit - 27th May 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 1,257

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