On Wed, 2 May 2007, W B Hacker wrote:

> But one might then ask, how MACRO's compare in potential load with:
> 
> - hostlists
> 
> - lookups (in general)
> 
> - lookups involving SQL calls

Indeed. But all of those items can be omitted from the config if you 
don't want them. Predefined macros would not be optional.

> Correct me if I am wrong, but I am under the impressions that a 'hostlist' is 
> handled much as the described parsing for a MACRO, i.e. - end-to-end 
> expansion & 
> substitution, called on or not...

No. A hostlist is expanded only when Exim is about to scan it. That is,
only when it is about to be used.

> - while a 'lookup' - be it file, db, or SQL - is ignored until actually 
> encountered in acl that *uses* it, IOW, skipped in many cases.

Indeed.

-- 
Philip Hazel            University of Cambridge Computing Service
Get the Exim 4 book:    http://www.uit.co.uk/exim-book

-- 
## List details at http://www.exim.org/mailman/listinfo/exim-users 
## Exim details at http://www.exim.org/
## Please use the Wiki with this list - http://www.exim.org/eximwiki/

Reply via email to