Performance

Supabase vs PlanetScale for Production Apps: Real Limits Tested

Supabase and PlanetScale both promise hassle-free databases for production, but their free tiers, scaling ceilings, and operational quirks differ in ways that only show up when traffic spikes. Here's what we found after pushing both hard.

Jun 18, 2026 10m read 👁 5

Vercel vs Fly.io for Full-Stack Apps: Honest Cost and Cold-Start Test

Deploying a full-stack app on Vercel feels effortless until the invoice arrives or a cold start kills your API response time. Here's a head-to-head cost and performance test based on real workloads, not marketing pages.

Jun 17, 2026 10m read 👁 5

Event Loop Blocking: Why Your setTimeout Callbacks Fire Late in Node.js

Wondering why your setTimeout() callback executes later than expected in Node.js? Learn how event loop blocking occurs, how timers actually work, and practical techniques to prevent delayed execution.

Jun 17, 2026 5m read 👁 3