Thunderbird also looking at the improved chi-squared algorithm

[David Relson]

On Thu, 13 May 2004 10:11:04 +0800
Yusuf Goolamabbas wrote:

> If any bogofilter developers have thoughts based on the experience in
> incorporating Gary Robinson's new algorithm in the 0.90 version, would
> appreciate if they could comment on this bug
> 
> http://bugzilla.mozilla.org/show_bug.cgi?id=243430
> 
> Regards, Yusuf

Hi Yusuf,

The ESF code is present in bogofilter and bogotune.  A default ESF value
of 1.0 is used for both spam and non-spam as this provides the same
scores as not using ESF.  Also, by default bogotune's scanning grid
includes ESF scanning.  As bogotune checks 5 ESF values for spam and 5
for non-spam, the result is to increase the number of calculations by a
factor of 25.  This increases the time for determining optimal tuning
factors by a lot.

The actual improvement from ESF is not clear.  It's very new.  It'll
take time (days, weeks, ...) to see how value it is.

HTH,

David