Would love to look into specific issues. If you are willing to post to GitHub your profile and a model (either a link or a zip) we will look into improving the speed. I know it is easy to create a case that is slow, but it is much more productive and inspiring for the team to be working on a real problem someone is having. We release a new build about every month and there have been many dedicated to improving the speed of a specific case. Thanks for reaching out.