Bash
Custom Bash Builtins in C: Lessons From awie-bash
Writing Bash builtins in C: the .def format, compiling into bash vs enable -f, what my old awie-bash code got wrong, and a tested loadable port with timings.
Topic
performance
Web
Docket Cache: A WordPress Object Cache Without Redis
A persistent WordPress object cache for hosting without Redis: each entry is a PHP file that OPcache keeps compiled. How it works, and what it did on a test site.
Programming
Debounce vs Throttle in JavaScript, With a Timeline Demo
Two small functions that stop search boxes and scroll handlers from running too often, with a runnable timeline that shows exactly when each one fires.
Web
nginx as a Reverse Proxy: Headers, WebSockets and Timeouts
What the backend really receives behind nginx: proxy_pass URI rewriting, Host and X-Forwarded headers, WebSocket upgrades, 504s from timeouts, and streaming.
Linux
Docker Multi-Stage Builds: Smaller Images, Same Result
The same 147 kB binary in a 257 MB image or an 8.44 MB one. Multi-stage builds, named stages, a --target debug image, and why build secrets still leak.
Linux
Dockerfile Layer Caching: Order Instructions for Fast Rebuilds
A one-line code change should not reinstall every dependency. Timed rebuilds show how instruction order, .dockerignore and ARG placement decide what Docker reuses.
Web
HTTP Cache-Control Explained: max-age, no-cache, ETags
no-cache does not mean do not cache. A hands-on look at Cache-Control, ETags and 304 responses with a tiny Node server, plus how a CDN treats them.