> Hi Roman
>
> I was wondering if you could help me out with a small problem... apologies if
> it's been covered before.
>
> When I scan (for example) cabinet art files, the process is very slow until CMP
> all but freezes up.
>
> The directory is unzipped- just a normal folder.
>
> All I can think is that only having 256 MB RAM simply is not enough.
>
> Can you confirm this, or might it be another issue?
>
> Many thanks, hope you're well,
>
> Sean
>


Just for benchmarking...a full mame scan takes about 1 minutes 20 seconds without diskcache usage and about 40 seconds with diskcache usage. That's on a P4 >3 GHz System with fast harddisks, without sha1/md5 check.

Scanning unzipped sets with any check-checksum options takes longer of course, since it has to recalculate the hashes. The unneeded checks have to recalculate the hashvalues, too, so scanning unzipped sets takes longer...and in most cases there is no need in scanning unzipped sets...why not keeping them zipped.

Further time intensive options are:

- settings->zipsettings->full zip structure scan
- scanner->checksums->unzip rom and check crc32/sha1/md5
- scanner->checksums->decompress chd and check sha1/md5
- scanner->checksums->rom checksum analysis->run analysis
- scanner->advanced->'fix missing' scans all sets (that's a performance killer!)
- scanner->advanced->additionally test sha1/md5 for matches
- a disabled 'use optimized rompath scanning'

Most of these options don't have to be set, so check if you use some of them and if you really need them.



Roman Scherzer