[exim] System filter length

Hello,
I was wondering how long a system filter could get, in terms of lines,
statements, and actions.
We have an application which write a new system filter based on new
rules on where to save mail to, add/remove headers, delivery rules,
etc.
Our needs have made the filter get very long, up to 1,000 lines right
now, with about 100 statement blocks.

Has anyone hit any 'limits' on the size of the system filter, or
severe performance degradation?
The servers still have pretty low load, even with processing 100,000+
messages daily.

Any experience or thoughts would be appreciated


--
Brent Jones
brent@???