Maybe it’s just me and my imagination, but I think full AV scan doesn’t use cache, because it takes about the same time to do full scan as in CIS 5 even after the PC was working whole day (I thought that real time protection “Contributed” to the cache, meaning Full scan will skip files checked by real time shield, unless changed). Quick scan and rating scan takes literary seconds.
Any comments on this?
After scanning once with the full scan try running a full scan once more. I think you’ll find that it’s significantly faster. 
Are real-time and on-demand caches even shared? It seems to me they aren’t…
So, does Full scan use seperate cache then?
I’m not sure. I just know from experimenting on my computer that I see a significant difference in full scan speed only after running the full scan once.
In case of avast!, on-access and on-demand caches are shared. If you leave avast! installed long enough and just using the system, even on-demand scans will become ultra quick. Or if you do on-demand scan, same will apply to on-access scans. But i’ve been using CIS 6 for very long, it shoudl populate the cache already. But on-demand scan is still ridiculously slow. So, to me it seems like caches aren’t shared. Unless someone from Comodo can explain it to us how caching works in CIS6…
The new “Cache” concept is still very confusing to me too…
Even the Devs are not explaining it clearly in full.
I did a full scan ten days ago, it took 5 hrs to complete for the first time, the subsequent scans took 1 hr each.
After five days, when I again did a full scan it again took 5 hrs. I really do not understand this…
There is no clear explanation whether the cache is rebuilt with each database update or how exactly the cache mechanism works.
I would also like to hear from the Devs about this…
Thats really strange. In avast!'s case, even scans after few days will be much quicker. Still not as much as after doing one after another but still a big difference that doesn’t go away after a while.