Slow processing with 3.2.4

[Spam Admin]

I have two mail servers running Spamassassin.  One is running 3.1.9 and 
the other 3.2.4, both with the same set of local rules, plus the 
standard rules that come with each version.

The 'load' on the processors for 3.2.4 is about *4 times more *than the 
'load' on 3.1.9. 

Do others have the same problem? Is this a typical change between the 
pre 3.2.x versions and the current version?

Dan Zachary