On Tue, 25 Sep 2001, Stas Bekman wrote:
> There is another performance issue with setvars I'm thinking about.
> Currently when you perform $r->dir_config I have to merge the directory
> and server configs and give you the new table. This may be very
> expensive. Now we could avoid this by doing a deeper merge at the
> configuration stage, but since we allow $s->dir_config->set|add the $s'
> vars can change and our merged version be wrong. So it sucks,
> performance wise of course, since we cannot pre-merge. I guess we should
> put a fat warning -- DO NOT Call $s->dir_config without arguments,
> unless you don't mind performance implications.
dir_config values are merged even if you don't call dir_config(). apache
calls modperl's per-directory and per-server mergers, which is where the
merging happens. calling ${r,s}->dir_config does not trigger merging of
any kind.
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