Re: [boost] [proto] Looong compile times and other issues

Subject: Re: [boost] [proto] Looong compile times and other issues
From: Thomas Heller (thom.heller_at_[hidden])
Date: 2011-09-12 09:36:13

On Monday, September 12, 2011 06:50:08 PM Joel de Guzman wrote:
> On 9/12/2011 4:06 PM, Thomas Heller wrote:
> > On Monday, September 12, 2011 02:57:21 PM Joel de Guzman wrote:
> >> The one you show above is also a very simple tweak. I welcome any CT
> >> improvements we can do as long as the code is kept in a reasonably
> >> comprehensible state. I applaud what you and Heller are doing.
> > 
> > I am trying to come up with a patch today. The changes Joel Falcou
> > suggests are really easy to do. And already promise to show significant
> > CT improvements.
> 
> Awesome! Looking forward to it.

Turns out it didn't work out that good ...
The patch can be downloaded here: https://gist.github.com/1211241
The fusion testcases compile, unfortunately they are around 10% slower to 
compile with that patch applied ...
What i have done is to simply avoid full specialisations of the form:

template <>
struct some_impl<some_tag> ...

The idea was to avoid eager instantations when this particular feature wasn't 
used. Looks like we have a false friend here. Maybe i missed something. Would 
be glad if someone points to what i miss.