Difference between clamscan and clamdsc an scanning time

neel roy via clamav-users <[email protected]>
Newsgroups gmane.comp.security.virus.clamav.user
Message-ID <1733540288.S.25751.autosave.drafts.1733540812.26214@webmail.rediffmail.com>
Hello,

I passed 10,000 files listed in the file to clamscan and clamdscan. I see very big difference on 4 cpu bare metal machine. Why is it?
I am using clamav 1.0.7.

clamscan -f large_files.txt - 3 mins 5 seconds
clamdscan --fdpass -f large_files.txt - 9 seconds

Notes
- For clamdscan, I am *not* using -m option.
- For clamdscan, without &quot;--fdpass&quot; it would give &quot;permission denied&quot; errors.

I understand that first 20-30 seconds or so I see clamscan is loading virus definitions. Even without that, the difference is difference is very big. What accounts for it?

Thanks in advance,
-Neel.

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