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List:       boost
Subject:    Re: [boost] Interesting article on stack-based TMP
From:       David Abrahams <dave () boostpro ! com>
Date:       2012-10-28 0:47:03
Message-ID: m2a9v7jud4.fsf () cone ! luannocracy ! com
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on Thu Oct 25 2012, Larry Evans <cppljevans-AT-suddenlink.net> wrote:

> On 10/25/12 12:24, Thorsten Ottosen wrote:
> [snip]
>> I guess some of my confusion comes from reading
>> 
>> http://www.jot.fm/issues/issue_2008_02/article2.pdf
>> 
>> some time ago. I think this article is why I thought they
>> were a bonus for compilation time.
>
> In particular, page 33, in the last sentence before section 3, says:
>
>   Section 4 demonstrates how variadic templates drastically reduce
>   compilation times

I believe that they do/can.  However, getting the most performance out
of variadic templates involves avoiding O(N) recursive template
instantiations, which can be maddeningly difficult to achieve for some
problems.

-- 
Dave Abrahams
BoostPro Computing                  Software Development        Training
http://www.boostpro.com             Clang/LLVM/EDG Compilers  C++  Boost


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