[Insight-developers] Insight-developers Digest, Vol 55, Issue 6

[Tom Vercauteren]

Hi David,

My goal wasn't to perform a comparison with other libraries. I just
wanted to make sure that newcomers could benefit from ITK as much as
possible.

I thought that the default mode was debug, but I might be wrong since
I always explicitly mention what kind of build I need... This
discussion actually stems from a feedback I had a few days ago on the
performance of the demons algorithm.
Me : "First of all, you should make sure that you compile ITK and the
diffeomorphic demons in Release mode."
User : "I've recompiled ITK in release mode, and then Demons... Thank
you very much, it now runs +/- 3.14 times faster. It was a very good
advice :-)"

Anyhow, this is the kind of discussion I have also seen several times
on the insight-users mailing list.

Regards,
Tom

On Thu, Nov 6, 2008 at 6:44 PM, David Fuentes <fuentesdt at gmail.com> wrote:
>
> I thought default was without any
>
>    -g -O?
>
> compilers flags.
> this would default to -O2 on most compilers? what are you comparing "slow"
> to? what kind of performance differences are you seeing w/ and w/o Release
> mode?
>
>
>
> df
>
>
>
>
>
>> Message: 3
>> Date: Thu, 6 Nov 2008 17:34:19 +0100
>> From: "Tom Vercauteren" <tom.vercauteren at m4x.org>
>> Subject: [Insight-developers] Should default compile mode be Debug,
>>        Release or RelWithDebInfo?
>> To: ITK <insight-developers at itk.org>
>> Message-ID:
>>        <28392e8b0811060834o57018b4aof7f0d4c9e4563c34 at mail.gmail.com>
>> Content-Type: text/plain; charset=ISO-8859-1
>>
>> Hi all,
>>
>> It seems that many new ITK users find ITK slow. Part of this is of
>> course based on some truth, but in many cases it ends up by
>> "OK, I didn't know I had to compile in Release mode."
>>
>> So I am wondering whether it wouldn't be easier if, by default, ITK
>> was build in Release mode (or maybe RelWithDebInfo).
>>
>> Indeed, I would expect that people that need ITK in debug mode are
>> people that know how to use a debugger and hence can manage to find
>> the adequate CMake option to switch to Debug.
>>
>> On the other hand newbies are less likely to know how to use a
>> debugger, won't tweak with CMake options and expect things to run
>> fast.
>>
>> Any thoughts?
>>
>> Tom
>>
>>
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>>
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>>
>>
>> End of Insight-developers Digest, Vol 55, Issue 6
>> *************************************************
>>
>