Preview app freezing and slowing down MBP

Since I updated to OS Mavericks my preview app has not been functioning properly. When the app is open when viewing PDFs a window (accompanied by a progress bar) pops up quite frequently that says "Saving changes... '#' documents remaining", with the # sign representing any number of documets. Often, the number of documents "remaining to be saved" progressively increases from 1 to 8 or so, despite there being only one document open. While the app is doing these "auto saves" my computer is slowed down significantly and while these interuptions occur I am usually unable to do anything else.
I will also add that the size of the PDF files that I view are rather large, on average 70-80 MB, although I'm not sure if that is the reason for the issue because before I updated to Mavericks I didn't have this problem. And the problem does also seem to occur with smaller sized files as well.
My computer usage is usually minimal when this occurs, typically only Safari is open in the background. I was advised to reset my SMC, which I did, but the problem is still occurring. Any additional advice or solutions would be much appreciated. Thanks.

Update: The Preview app is using a lot of memory and I don't know why.
With activity monitor on, I notice that the memory usage for the app spikes considerably when viewing PDFs, especially when I scroll, exactly the same problem as you, loveceratops. When a PDF is initially openend, the activity monitor shows memory usage around 50 MB, but when I scroll within the PDF the memory usage shoots all the way up to 500 or 600 MB. It's at this point that the glitches preciptating in Preview begin to occur.
I've tried deleting/recreating the preview app's ".plist" files in the "Preferences" and "Containers" folders, but that has not solved the issue. I want to try to reinstall Preview, and I just might, but I'm also considering reinstalling OS Mavericks since that may be easier; but I'm concerned that the same problem would still keep happening since I'd be recovering all my files from Time Machine after the reinstall.
Any help solving this issue would be much appreciated, thanks in advance. This is a very frustrating problem.

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