The more cores you have, the slower TTS runs when people pick up cards.
Here's a video that shows the problem: https://www.youtube.com/watch?v=EIJE_qhXTj8
Please see this thread for details and a "workaround" until TTS devs fix the underlying issue:
https://forums.tabletopsimulator.com/showthread.php?8665-Holding-cards-causes-slowdown
Every time I launch TTS I have to tell it to use less cores to make it run. Please put out a fix. Thanks.