Very long wait after audio processing

Events, based on a long audio file, processed in Sample Editor: after processing- very long wait for program to be ready for operation. Cubase 6 was ready right away even on 8 Gb files. C8 freezes for 30 sec. on 2 Gb file.
Seems like a kind of updating the whole file each time.
I mean- of course- short fragments being processed, like removing some clicks.
Anybody else noticed such problems?