This is a strange one. I imported some libraries from EAGLE by exporting as an .scr and then importing the .scr in Diptrace. The library works, but, oddly, when I use a lot of components from it, Diptrace really bogs down. For example, a metal pour that might take a fraction of a second normally takes 10 seconds. Similarly, moving traces seems sort of slow and laggy.
It definitely has something to do with these imported parts, but I'm not sure what.
The library is the Seeed Studio Open Parts Library.
Running Diptrace 2.4.0.2