I'm the only guy with the source. Anyway there's nothing I can do to show you the bug. Maybe someone else will eventually come forward with relevant information. Thanks. Cya.
Oh, I thought Blitz was referring to a game of his own. But as I said you still have one thing you can do: try older 511 builds to narrow down the version where this appeared.
I was unable to reproduce this bug in ss13 by putting 150 human mobs (each human mob having up to 27 overlays) on a single tile and then alt clicking on the turf to display the contents of the turf in a stat panel.

I don't think it's completely about mobs ,but the excessive use of the stat() to display dynamic icons from about 100 clients in 3 tabs might be the issue.Lummox himself said that stat() was never made to hold a lot of info

And when tens said it lowered the frame rate he just meant that game play became choppy when opening either of these tabs not literally lowering fps
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