People advertising they're running Parsers

[Esper56]

Actually, yeah, that's usually how it's done.

FFLogs re-parses the completed log-file after the fact and provides significantly more indepth analysis about runs, where ACT's real-time output is considered pretty primitive and often unhelpful.

See now this is the information I seem to have been missing or overlooked through this entire thread/articles I've read on what parsers are. The whole time it seemed like everyone was talking about a plug-in/addon that was constantly doing it in real time and not something done after the fact to review your mistakes.