Using CC v3.10.1525.
I am experiencing exceedingly long runtimes with CC, especially when it gets to Chrome internet cache.
It often cleans 80-280 mb and takes 4 minutes or more.
I run CC after every browsing session, daily, sometimes twice daily.
The culprit seems to be Chrome.
Running CC when I used to use IE8 browser took hardly any time at all.
I am using secure deletion, with 1 pass overwrite, and also have Wipe MFT Free Space enabled, but not Wipe Free Space drives.
I also recently added CCEnhancer, but to the best of my recollection, these extreme cleaning times were happening even before adding it.
Again, it really looks like an issue between CC and Chrome.