Author: Stefan Klatt Date: To: exim-users Subject: Re: [exim] Idea: Predefined macros
Hi Nigel,
>> On 2 May 2007, at 22:29, Stefan Klatt wrote:
>> What about a precompiled configfile for the next version?
>> If the configfile changes only one configfile compilation is
>> necessary.
>> This would save a lot of cputime.
> I *so* nearly wrote a message suggesting an equivalent to (the old,
> now dropped) sendmail frozen config yesterday. Brr.... i didn't thought about this horibble extreme version of
precompile...
> The thing we could, of course, take from sendmail, is to do macro
> expansion outside the MTA - ie pre-process a macro-ised config file
> into the real config file using the macro preprocessor of choice (in
> my case not M4). You can then make things arbitrarily complex
> without a run-time hit. In my humbled opinion its faster to save the interpreted (compiled)
config file exim internal use to a file and use this until the
configfile or a macrooption exim called with is changed.
Like Python... the interpreter compile a program (not every file!) on
the fly save the compilation to disk and use it if you call the program.
Mfg.
Stefan Klatt
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CaC, Computer and Communication
Inhaber Stefan Klatt
Triftstrasse 9
60528 Frankfurt
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