I think the problem revolves around the "Secure File Delete" option.
With this option switched ON, cleaning with 88 files in the Temp Int Files folder took about 9 seconds, the file display probably displaying the filename of about 1 in 10 files.
With the option switched OFF, cleaning is very quick, too fast to quantify, but less than a second. Nothing was displayed in the CCleaner window during this cleaningi process.
I started this thread after updating from an earlier version, and all personalised configuration settings were retained, as is usual in the upgrade process.
Although I can't be 100% certain, I believe I had secure file delete turned on before the update. That would make sense, there's no point only half-hiding your browsing history
IMHO, there is something different in the later version.
When I get chance (possibly tomorrow) I will revert to previous version and run similar tests.