[ITK] [ITK-dev] Precompiled header support

[Matt McCormick]

Hi Brad,

I tested with

  Clang 3.5.0

and

  GCC 4.9.3

on Linux. This was testing the build time of the library and the
tests.  The examples or WrapITK or SimpleITK could also use the
infrastructure, but more code would have to be added, and I do not
expect any different behavior there.

I did find the Clang generally builds faster than GCC.  My current
personal go-to build is Clang / Linux / MinSizeRel for development
performance.

Thanks,
Matt

On Tue, Nov 17, 2015 at 9:46 AM, Bradley Lowekamp
<blowekamp at mail.nih.gov> wrote:
> Matt,
>
> Great to share the results. But I would like a few specifics...
>
> What compiler versions?
> The Build time of what?  WrapITK? Perhaps this does not help building of ITK
> and ITK tests/examples, but would help applications which heavily use ITK.
> Maybe it'd improve SimpleITK build time or ITK Examples built against ITK?
>
> Brad
>
> On Nov 17, 2015, at 9:40 AM, Simon Alexander <skalexander at gmail.com> wrote:
>
> Hi Matt,
>
> By any chance did you try this with microsofts build tools?
>
> On Fri, 13 Nov 2015 at 18:15 Matt McCormick <matt.mccormick at kitware.com>
> wrote:
>>
>> Hi folks,
>>
>> In the hope of reducing ITK build time, I started work on adding
>> pre-compiled header support to ITK here:
>>
>>   http://review.source.kitware.com/#/c/20349/
>>
>> Unfortunately, after testing the build times with both GCC and Clang,
>> there was no notable benefit to build times.  I'm abandoning the
>> patch, and hopefully the lesson is beneficial for any with false-hopes
>> of the advantages to pre-compiled headers!
>>
>> Thanks,
>> Matt
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