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From: Beman Dawes (bdawes_at_[hidden])
Date: 2004-01-22 12:19:10

At 11:36 AM 1/22/2004, Phil Richards wrote:

>On Tue, 20 Jan 2004 18:44:32 +0000, I wrote:
>> On Sun, 18 Jan 2004 00:19:44 -0600, Aleksey Gurtovoy wrote: [with
>> to my performance problems using the MPL]
>>> Sounds like something is wrong. Let's figure it out.
>[example program and results stripped]
>I've had a poke around with the example program and looked at the
>implementation of fold. Each of the fold statements in the example
>adds about 0.5 seconds. Very roughly,
>0.1 seconds can be allocated to zip_view<vector2<V1, V2> >
>and the same (actually a little over 0.1 seconds) to
> begin<Sequence>::type
> end<Sequence>::type
>in the implementation of fold (parameters to aux::fold_impl).
>I'm going to try a non-general re-implementation of fold, and see what
>happens, but, it won't be pretty even if it is more efficient. And, of
>course, it won't be general.

Given other timings which showed great differences between compilers, you
might want to report the results for several compilers.


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