[Insight-users] Performance regression in ITK + gdcm 2.0 reading DICOM JPEG files

[Bradley Lowekamp]

Hello Roger,

That looks like a nice table to look at for performance analysis!

Are your versions of ITK stock? I am surprised at the results because of the bug that we fix related to the UpdateOutputInformation taking too long. I expected that to be costly in 3.16, but better in 3.18. 

Brad

On May 13, 2010, at 5:00 PM, Roger Bramon Feixas wrote:

> Hi,
> 
> Recently we updated our ITK version from ITK 3.16 to ITK 3.18 and we decided to relink ITK with system GDCM 2.0. After some tests, we concluded ITK 3.18+GDCM 2.0 is faster than ITK 3.18 reading DICOM Little Endian files, however ITK 3.18+GDCM 2.0 is rather slower reading DICOM JPEG files. I attach a PDF file which is a time comparison of ITK 2.8, 3.16, 3.18 and 3.18+GDCM2.0 versions. 
> 
> I don't know if it's just a GDCM problem or if it depends on how ITK uses GDCM.
> 
> Thanks for your attention,
> 
> Roger
> <Performance ITK + gdcm 2.pdf><ATT00001..txt>