UUIDs explained — the uniqueness myth, the version you should be using, and the database mistake that slows everything down

You've generated thousands of UUIDs without thinking twice. id column, default value, done — a 36-character string that looks like f47ac10b-58cc-4372-a567-0e02b2c3d479 shows up, and you move on. Most developers treat UUIDs as a black box: "long random thing, guaranteed unique, don't ask questions." Except it isn't guaranteed, there are eight...