Any way to mitigate slowdown caused by scoring on article headers?

I recently started scoring articles on header fields other than
subject, and it's causing about a 100X slowdown when I enter a
group.  Previously (scoring only on subject headers), a single
XOVER command grabbed all of the info needed. Now slrn sends
commands to fetch headers for each article.  I don't suppose
there's anything I can do to mitigate the problem? (Without
letting in the flood of spam from google groups.)

-- 
Grant Edwards                   grante             Yow! My uncle Murray
                                  at               conquered Egypt in 53 B.C.
                               visi.com            And I can prove it too!!


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