I tried this for some folders. Music ones to be precise. I don't know why, but sometimes it runs well, and sometimes, it's awfully slow, in fact, taking hours to complete a 2000 folder entries. So far, I didn't detect what causes that slow down. Only one thing is sure, it eats a whole processor all the time. So, good for the information it gives, but really bad in terms of efficiency. Sorry guys, but this thing sucks !
The software developer responded to this review on Aug 02, 2012:
The problem about eating all CPU is true, but only when creating new catalogs or searching (these are heavy tasks). Also, this will be a problem only on single CPU core machines (on multi-core machines InsideCAT will "eat" only one core). No problem for multi-core computers. About "long-time" catalog creating, this usually means unreadable (or partially unreadable) files. Check disk integrity if this happens (InsideCAT 5 calculates CRC32 checksum for all files, if InsideCAT assigns a zero CRC32, 00000000, the file is not fully readable).