Cubase slows down and project files get huge when quantizing multi-mic recordings

I recorded drums in multi-mic set up, multiple takes on multiple lanes. When quantizing these tracks pool grows large, Cubase becomes unresponsive for minutes when it saves and what should takes me minutes, takes hours.

win 10, cubase 9.5.20 pro


If you split the events, then you get lots of events in the project, which costs much more CPU load. If you are happy with the quantise result, you can Render it to the Audio parts, to get only one Audio event per track, which is not so CPU hungry then.