I just remembered....
There's a known issue in the current build (fixed in the next build) that causes slowdowns when playing a simulation for the first time during caching. This only happens when playing a simulation frame-by-frame (ie, hitting play and waiting for it to cache)...it doesn't happen when simulating a chunk of frames (ex: snapping the timeslider to the end frame and waiting for the simulation to finish). This slowdown would indeed be happening under the caching event noted in the profiler....however, it doesn't seem to be what you were running into in your video...but it's possibly related.
Next build will be out soon....once it's out it would be a good time to test. I can't recall when this regression was introduced...you could experiment reverting back to the last beta build and see if you see the same performance degradation. If you don't then this bug is likely the cause. Grab the latest beta here: https://docs.tyflow.com/faq/beta
There's a known issue in the current build (fixed in the next build) that causes slowdowns when playing a simulation for the first time during caching. This only happens when playing a simulation frame-by-frame (ie, hitting play and waiting for it to cache)...it doesn't happen when simulating a chunk of frames (ex: snapping the timeslider to the end frame and waiting for the simulation to finish). This slowdown would indeed be happening under the caching event noted in the profiler....however, it doesn't seem to be what you were running into in your video...but it's possibly related.
Next build will be out soon....once it's out it would be a good time to test. I can't recall when this regression was introduced...you could experiment reverting back to the last beta build and see if you see the same performance degradation. If you don't then this bug is likely the cause. Grab the latest beta here: https://docs.tyflow.com/faq/beta