Hi 3ddd - we received a similar message in our support portal (https://coronarenderer.freshdesk.com/support/tickets/new) - was that you? My first suggestion would be to install all Windows Updates and MSVC++ as instructed here:https://coronarenderer.freshdesk.com/support/solutions/articles/12000011862-material-editor-is-very-slow-freezing-in-corona-1-4
What is happening with memory consumption?Is bitmap paging of?Have you tryed siplifying scene?Do you have any programs with heavy memory consumption running in the background?
About bitmap paging disabling. Open render setup>common tab. Look if bitmap paging is disabled (1), if not, press on setup (2) and uncheck page large images to disk option (3). When you'll do that, save scene and reload it. See if it helps.
Can you post the 1.3 and 1.4 times difference ? Did you try it with 1.3 in your PC too ?Does Corona write something like 'runnin low on memory' ? If not than the memory is ok.Bitmap paging/proxy can be turned on/off (should be always off) from Render settings first tab, or from Asset tracking.
3ddd, can you contact us using this form? https://coronarenderer.freshdesk.com/support/tickets/newIt would be great if you could send us that slow scene, or any other scene where the problem appears. We could then check if we are experiencing the same problems on our PCs, otherwise it could be something on your side, and we might attempt to fix it.