There is information about how to avoid and work around this problem in the tread that you linked to, in my first post on that thread:

http://forums.adobe.com/message/5508252#5508252

“In the meantime, here's how you should be able to mitigate the problem:

Make sure that your software is installed on the fastest disk that you have, preferably an SSD. If you don't have an SSD, then at least make sure that your software (applications and OS) are not stored on the same drive from which you're reading footage or to which you're writing output files. And certainly don't run applications with high disk access (like WinZip or anti-virus software that intervenes at every disk access, just for a couple of examples) while you are working with After Effects. (BTW, this is all good advice for high performance even without this bug.)”

Note that the only way that we’ve been able to reproduce this problem is to use a very slow disk for applications or have high disk activity (continuous reads and writes) to the disk where the application is installed.

I’ve verified the fix for this bug in internal builds of After Effects CC (12.1), so I’m confident in saying that you will have access to this fix very soon (in a couple of weeks).