[Insight-developers] itk v4 performance questions

[Johnson, Hans J]

Rupert,

We are working on the performance right now.  There was a change made that introduced unexpected performance penalties (actually exposed an existing performance problem by exacerbating it to the extreme).

Please follow along with this patch set as it propagates through the toolkit:
http://review.source.kitware.com/#/c/6369/

Hans


--
Hans J. Johnson, Ph.D.
hans-johnson at uiowa.edu<mailto:hans-johnson at uiowa.edu>
Assistant Professor of Psychiatry
University of Iowa Carver College of Medicine
W278 GH, 200 Hawkins Drive
Iowa City, Iowa 52242
Phone:  319-353-8587

From: Rupert Brooks <rupert.brooks at gmail.com<mailto:rupert.brooks at gmail.com>>
Date: Thursday, July 19, 2012 8:19 AM
To: ITK <insight-developers at itk.org<mailto:insight-developers at itk.org>>
Subject: [Insight-developers] itk v4 performance questions

Hi,

I've been porting some code from itk 3.20 to itk v4.  While i can achieve numerically identical results with a little work, I'm noticing a 10-30% performance decrease overall.  At this point it seems kind of generalized, i have trouble tracking it down to a specific routine or module which makes me think it may be buried in low level code.

It does not seem to be the GetInput issue raised earlier on the list.

This is on Visual Studio 2005, XP, 32 bit.  I do not know if it is generalized - indeed, it could easily be the case that modern C++ which compiles better on gcc and clang is confusing this old compiler.

Are there already any ITK performance benchmarks?

Rupert
--------------------------------------------------------------
Rupert Brooks
rupert.brooks at gmail.com<mailto:rupert.brooks at gmail.com>



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