Posts from December 2025 [ on iamcal.com ]

Posts from December 2025

Dec 22nd: Jeff & Sanjay recently published a bunch of performance hints, many (most? all?) of which are universally useful approaches for software engineering in general

Dec 22nd: Text editing is just much more complex than you might imagine.

Dec 9th: An interesting (hour long) video about the walk/pathing system from The Witness (and generally how difficult collision and pathing is in 3D games)

Devil Platforms

Level Devil a great little 'frustrating platformer'. I love this genre, mostly to watch, as playing is pretty frustrating [via Myles]

About

This is the personal website of Cal Henderson, Slack co-founder & CTO.

I give occasional talks, write code and sometimes articles.

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