Disable logging - Whitelist functionality

[asteddy]

Hello,
I would like to know if I can disable spamassassin logging because I think it's 
slowing down. 
I would also know if there is a way to say to spamassassin that whitelisted 
addresses don't need to pass all other rules. 
If there was already a thred talking about these arguments please tell me where 
I can find it because I haven't found a searching engine in the mail archive 
and I have subscribed the list only now.
Thank you in advance.
Asteddy