A helper that throws an HTTP exception was typed void, so every caller had to write an unreachable return statement to satisfy the analyser. never means the function…
Two services behind one hostname, with a routing table that somebody wanted to solve with a gateway product. A gateway earns its place when routing is dynamic, when…
The domain layer talked about a consignment, the database called it a shipment, and both terms appeared in the same conversation with different meanings. Renaming the table was…
A public REST endpoint serving the same payload to everybody, hit forty thousand times a day, and generated forty thousand times. WordPress sends no-cache on REST responses by…
Brotli compresses better and costs more CPU, and whether that is worth it depends on a number nobody measures. The high compression levels are for static assets compressed…
A per-request memoisation cache keyed by object was holding every entity loaded during a long-running command, and the command was using 900 MB by the end. This only…
A worker that had been restarting every 40 seconds for eleven days, reported as active by every check that looked. Restart=always with no burst limit converts a hard…
Two developers on different package manager versions produce lock file churn that looks like a real diff and is not. One line in package.json removes an entire category…
Development mode mounting, unmounting and remounting every component is a diagnostic, and the double-fetch it produces is the diagnosis rather than the bug. An effect that cannot survive…