Eight parallel workers against one database is eight processes fighting over the same rows, and the failures look like flakiness. The setup cost is what determines whether parallelism…
Preloading compiles and links classes into shared memory at startup, and the linking is what makes it different from opcache. The measured gain on a typical framework application…
An unbounded query works on the development database with four hundred rows and takes the site down at forty thousand. fields => ‘ids’ is the other half and…
The three logical assignment operators short-circuit, which means the right-hand side is not evaluated and the assignment does not happen at all when the operator does not fire.…
Storing events as the source of truth gives a perfect audit log and makes every subsequent decision harder, including the ones that seemed unrelated. The GDPR deletion problem…
A stub provides answers and a mock asserts on the calls, and conflating them produces tests that break when the implementation is refactored. Asserting on a call that…
webpack 4 numbered modules in resolution order, so adding one import renumbered everything after it and changed the vendor chunk hash. Separating the runtime is the other half:…