do you have large files/projects as they speak about in the aforementioned eclipse list? If you dont, and see this slowish behaviour in even smaller projects there may be some special problem of your setup, because as mentioned I dont see any slowdown of the editor which I take note of. So it CAN work.
Only thing which I find slow is compilation. It even takes a fair amount of time (15s or more) to figure out which files are outdated and gets on doing the job.
Moving to another ide-platform... I guess and this is only a guess, you will be very much on your own.