Caching a package manager’s downloads in a layer bloats the image and is invalidated by anything above it. A cache mount lives outside the image entirely. The syntax…
A collection asserting that the total is 4900 fails whenever the seed data changes, which is every sprint — and gets deleted rather than fixed. Asserting on presence…
A monorepo pipeline that runs every job on every push spends most of its minutes proving that unchanged code still works. The required-check interaction is the part that…
A development machine accumulates dangling layers, stopped containers and orphaned volumes, and none of it is visible until the disk fills. -a –volumes deletes the database volume of…
The return expression is evaluated before finally runs, and the value is not handed to the caller until afterwards — so a finally that returns wins, silently. A…
Full-fidelity tracing on a busy service is a considerable volume of data and a considerable bill, and almost all of it describes requests that were fine. Head-based sampling…
3.1 in December 2019 is the long-term support release, and .NET 5 in November 2020 drops the “Core” without being a different platform. Skipping 5 and waiting for…
Every PHP request opens its own database connection, so a hundred concurrent requests is a hundred connections — and there is no pool because there is no process…