Speeding up filters - options and tweaks

[stan_qaz]

I didn't see this mentioned recently but there is a filter optimizer built into MW that takes the data you enter and rearranges it a bit for internal use. You can see what it is doing to your filters by looking at the beginning of the log. Using what it shows you and a bit of tweaking you can possibly reorder your filter rules and change the conditions a bit and come up with a faster running filter.

MWPapi log:

Code: Select all

08-26-2010 	12:58:26.109	MWPUI                   	Adding filter: A-Empty
08-26-2010 	12:58:26.125	MWPUI                   	Optimised rule: Name=QS1FbXB0eQ==_1, Field=subject, Expression=(EMPTY\ EMAIL)
08-26-2010 	12:58:26.125	MWPUI                   	Optimised rule: Name=QS1FbXB0eQ==_2, Field=from, Expression=(MWPappAcct)
08-26-2010 	12:58:26.125	MWPUI                   	Adding filter: A-Resent-From MW
08-26-2010 	12:58:26.125	MWPUI                   	Optimised rule: Name=QS1SZXNlbnQtRnJvbSBNVw==_1, Field=header, Expression=((?:^Resent-From: MailWasher? Pro recycle bin))|((?:^Received: from mw.nowhere.com))

I'm debating with myself on a couple filters where I could reorder the rules to put likely hits first and shave a bit of time off the filter but at the expense of readability and ease of maintenance. There have been requests for a search function within the filter edit dialog that would make this a lot more attractive or I could just open the filter.xml file in my web browser and search from there.

I've switched a few filters from plain text to regex so that I could cut down on the amount of text they have to search, things like the "^" to limit the search to the start of the line/field or using the regex "|" or condition to eliminate duplicate searching of the same text in different rules.

[anniebrion]

Thanks for this I've now got all bar 1 of my filters optimized so MWP does not have to do it for me