Tools & Insights for Building
with AI
Practical guides, open-source utilities, and experiments in AI & software engineering - created and tested by me, Stephen Collins.
Featured Posts
Running Hotspots on expo/expo Without Running Out of Memory
Stephen Collins
•
Apr 12, 2026
6 mins
expo/expo crashed Hotspots with an OOM. Here's the full account — what broke, the systematic fixes across memory and CPU, and...
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hotspots diff: Compare Complexity Between Any Two Branches, Tags, or Commits
Stephen Collins
•
Mar 26, 2026
8 mins
Delta mode compares a commit to its parent. That's fine for local development — but CI needs to compare a PR branch to main, ...
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What Happens When You Run Hotspots on 102,000 Functions
Stephen Collins
•
Mar 14, 2026
3 mins
I stress-tested Hotspots against VS Code (102k functions) and found an O(N³) bug, a sampling tail exclusion bug, and a philos...
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