I was building a cross-platform GUI. Everything worked smoothly until I changed some stuff and the Form Designed got terribly slow. I did multiple operations and I don't know which exactly broke Delphi. Some of them:
Switching Style between Windows and other platforms.
Switching View between master and OSX, etc.
Adding StyleBook to the form.
Others
Moving/resizing a control with ctrl+arrows takes one second per pixel!
Any idea how to repair the IDE?
Update:
Deleting the StyleBook didn't help. However, after removing the MainForm.iPhone.fmx, MainForm.Macintosh.fmx, MainForm.Surface.fmx, etc helped. So, the bug appeared after I switched the view. This is when those files are autogenerated. Most of the speed (let's say something like 75-80%) recovered after that.
We have to figure out how to make the project work without those files. Or if we can simply delete them every time the designed gets slow. First of all I will check what kind of information does the IDE store in there.