From: Rene Rivera (grafik.list_at_[hidden])
Date: 2004-11-17 11:56:04
Vladimir Prus wrote:
> On Wednesday 17 November 2004 11:30, Rene Rivera wrote:
>> allyourbase.jam boost-base.jam
>>Fix extra updates on targets when a header has the same name as a directory
>>which is in the headers search path.
>>+ if ! [ GLOB "$(bound-path)" : * ]
>>+ header-locate = $(bound-path) ;
> Rene, did you do any performance testing of this patch? This seems to me a
> pretty easy way to kill performance. FWIW, I've spend some time removing any
> loops from V2 header scanning because of performance reasons.
It will definitely make things slower... And there are ways to make it
faster. But this is BBv1 so the lifetime is limited, it can be improved
with some caching if needed. I expect that we can come up with a much
better fix for BBv2. Most likely adding some Jam native rule to handle this.
While working on this I noticed a rather slow aspect of the way binding
works in Jam. If a binding does not already exist it will do directory
scans every time to search for a binding. That should be a candidate for
caching, no point in scanning the same directories over and over for
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