Wrapping a call in two microtime(true) readings looks like a measurement and is mostly noise: one iteration, no warm-up, and the timing includes whatever the loop and the…
A hundred Redis commands issued one at a time cost a hundred network round trips. On the same host that is around a millisecond total; across an availability…
ALTER TABLE on 30 million rows blocks writes for 40 minutes, and checkout writes to that table. A shadow table, triggers, and a backfill paced by replication lag.
Thirty-one requests before the page could do anything, most of them under 2 KB. Concatenation in a declared order, source maps, and cache busting that proxies respect.
5.3 stops getting security fixes in August. Deprecations first, then the behaviour changes, then the version bump — and an APC replacement that ignores every setting you tuned.