.2563 Water extremely slow and high RAM usage

On .2563, Water is constantly running at 95% of my available RAM and is extremely slow, to the point that I keep getting “app unresponsive” messages from Windows and have to kill the process. I had to revert to .2561, which I’m not having any issues with.

Curious; nothing really changed in Water between 2561 and 2563. Do you see this with any project, or just a specific one?