Animating top or left makes the browser recompute layout on every frame, then repaint, then composite. Animating transform skips the first two — the element is already painted…
LIKE cannot use an index and everyone knows it. The mapping, the analyzers that decide what matching means, the indexing pipeline, and the drift it introduces.
A single DELETE removing two million rows holds locks for the duration, generates one enormous transaction in the binary log, and a replica applying it single-threadedly falls behind…
OPcache keeps compiled bytecode in shared memory, which is empty after every restart — so the first requests following a deploy or an FPM reload each pay full…
gzip on compresses every response as it is sent, which for a static bundle means doing the same CPU work for every visitor to produce an identical result.…