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…
Responsive images used to mean shipping the desktop file to everyone, or swapping src after load — which downloads both. srcset hands the browser the candidates and lets…
OPcache has shipped with PHP since 5.5 and is disabled in several distribution builds, which means a good number of production servers are compiling every file on every…
Redis is single-threaded, so a command that takes a long time blocks every other client for that whole time. KEYS * walks the entire keyspace in one command,…