Full-stack developer in Bangkok writing about TypeScript, ElysiaJS, DevSecOps, and a slow pivot into financial engineering.https://blog.icerust.dev/https://blog.icerust.dev/blog/why-is-elysiajs-so-fast/https://blog.icerust.dev/blog/why-is-elysiajs-so-fast/A look inside Sucrose and how Elysia generates request handlers, separating framework JIT, engine JIT and build-time AOT, with the trade-offs and how to evaluate the gains on a real API.Fri, 02 Oct 2026 00:00:00 GMThttps://blog.icerust.dev/blog/what-is-financial-engineering/https://blog.icerust.dev/blog/what-is-financial-engineering/What Financial Engineering is, what you study, what it costs, and how to prepare — notes from the first 3–4 weeks of an M.Sc. at UTCC.Sat, 19 Sep 2026 00:00:00 GMThttps://blog.icerust.dev/blog/wrangler-auto-config-broke-my-deploy/https://blog.icerust.dev/blog/wrangler-auto-config-broke-my-deploy/A green deploy in August, an identical pipeline in September, and a build that failed twice. The cause was a tool my CI downloads fresh on every run, answering its own setup prompt with yes.Sun, 13 Sep 2026 00:00:00 GMThttps://blog.icerust.dev/blog/elysia-hono-postgres-on-m5-air/https://blog.icerust.dev/blog/elysia-hono-postgres-on-m5-air/A repeated, single-machine comparison using a shared Bun SQL database layer, with downloadable measurement evidence.Sat, 12 Sep 2026 00:00:00 GMThttps://blog.icerust.dev/blog/energy-per-request-on-m5-air/https://blog.icerust.dev/blog/energy-per-request-on-m5-air/I measured what an HTTP request costs in joules on a fanless MacBook Air M5. Express is 2.3x slower than Elysia but only 1.8x hungrier — because it cannot draw as much power. Then I found out the load generator was using four times more CPU than the server it was measuring.Wed, 26 Aug 2026 00:00:00 GMThttps://blog.icerust.dev/blog/bun-http-framework-benchmark-on-m5-air/https://blog.icerust.dev/blog/bun-http-framework-benchmark-on-m5-air/Reversing the order of the target list reversed the ranking. What a fanless laptop actually measures when you benchmark eight Bun HTTP frameworks back to back, and what the numbers look like once you stop doing that.Sun, 23 Aug 2026 00:00:00 GMT