> * How big of a performance difference is there between property-based &
> RainerScript filters when doing a simple check?

V5: quite a bit, very noticable on a high end system
V7: none at all
In (recent) v7 there is a script optimizer. It detects when an expression is a 
simple property-based filter and recompiles it into exactly the same thing.

In the master branch, the optimizer even detects things like checks for 
syslog-priority-text and compiles these down into selector-based filters. While 
I am still working on it, the optimizer now covers a lot of cases where 
previously manual work was required.

> * Is there a large difference in this .. difference between rsyslog v5
> and rsyslog v7? (I mostly use v5 in production on RHEL & Fedora. And
> yes, I'm well-aware of [and thankful for] the new rpm repo.)

Looks like I already answered that ;)

Rainer
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