# \#performance

**URL:** https://discourse.itk.org/tag/performance/7.md

[Latest](https://discourse.itk.org/latest.md) · [Categories](https://discourse.itk.org/categories.md) · [Tags](https://discourse.itk.org/tags.md)

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## [~8x slower registration with itk-elastix Python API vs elastix CLI — minimal reproducible example](https://discourse.itk.org/t/8x-slower-registration-with-itk-elastix-python-api-vs-elastix-cli-minimal-reproducible-example/7736)

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**Author:** [@NicoKiaru](https://discourse.itk.org/u/NicoKiaru)\
**Replies:** 39\
**Last updated:** [June 5, 2026, 7:14pm UTC](https://discourse.itk.org/t/8x-slower-registration-with-itk-elastix-python-api-vs-elastix-cli-minimal-reproducible-example/7736 "2026-06-05T19:14:41Z")

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Disclaimer: this is a \[crosspost from image.sc\]( ~8x slower registration with itk-elastix Python API vs elastix CLI — minimal reproducible example - Usage & Issues - Image.sc Forum ) Hi all, I’m integrating itk-elastix…

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## [How to pass output memory to a filter (avoid a copy to external memory)?](https://discourse.itk.org/t/how-to-pass-output-memory-to-a-filter-avoid-a-copy-to-external-memory/4501)

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**Author:** [@emmenlau](https://discourse.itk.org/u/emmenlau)\
**Replies:** 10\
**Last updated:** [October 26, 2021, 7:07pm UTC](https://discourse.itk.org/t/how-to-pass-output-memory-to-a-filter-avoid-a-copy-to-external-memory/4501 "2021-10-26T19:07:10Z")

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We use ITK together with a lot of older code that has its own memory management. It was quite easy to wrap our memory containers into an itk::Image using itk::ImportImageFilter. It was also very straightforward to apply …

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## [itk and gpu computation](https://discourse.itk.org/t/itk-and-gpu-computation/3800)

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**Author:** [@pierrectl](https://discourse.itk.org/u/pierrectl)\
**Replies:** 3\
**Last updated:** [January 29, 2021, 10:38pm UTC](https://discourse.itk.org/t/itk-and-gpu-computation/3800 "2021-01-29T22:38:28Z")

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Hello everybody, I browsed through the forum in order to find if some itk pipelines such as registration processes can be computed by the gpu of my computer. I saw this topic from 2017: https://discourse.itk.org/t/is-it…

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## [Call for help: performance benchmarking results](https://discourse.itk.org/t/call-for-help-performance-benchmarking-results/1593)

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**Author:** [@matt.mccormick](https://discourse.itk.org/u/matt.mccormick)\
**Replies:** 2\
**Last updated:** [March 11, 2019, 2:29am UTC](https://discourse.itk.org/t/call-for-help-performance-benchmarking-results/1593 "2019-03-11T02:29:34Z")

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Hi folks, We need your help. A team of students from the University of North Carolina-Chapel Hill is developing an application to visualize the ITK performance benchmarks. This tool will help us understand how changes …

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## [ITK 5.0 Release Candidate 1: Meshes](https://discourse.itk.org/t/itk-5-0-release-candidate-1-meshes/1576)

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**Author:** [@matt.mccormick](https://discourse.itk.org/u/matt.mccormick)\
**Replies:** 2\
**Last updated:** [February 14, 2019, 1:07pm UTC](https://discourse.itk.org/t/itk-5-0-release-candidate-1-meshes/1576 "2019-02-14T13:07:16Z")

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We are happy to announce the Insight Toolkit (ITK) Release Candidate 1! :tada: As the first release candidate, the major advancements for ITK 5 have matured, and the community is encouraged to adopt the release candidat…

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## [ITK 5.0 Alpha 2: Performance](https://discourse.itk.org/t/itk-5-0-alpha-2-performance/959)

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**Author:** [@matt.mccormick](https://discourse.itk.org/u/matt.mccormick)\
**Replies:** 0\
**Last updated:** [May 29, 2018, 1:50pm UTC](https://discourse.itk.org/t/itk-5-0-alpha-2-performance/959 "2018-05-29T13:50:10Z")

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ITK 5.0 Alpha 2 is ready for testing! Source code (zip) Source code (tar.gz) Major improvements in ITK 5.0 include a switch to C++11 language standard, improved performance, and cleanup of legacy code. More informatio…

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## [MultiThreader refactoring to allow TBB backend](https://discourse.itk.org/t/multithreader-refactoring-to-allow-tbb-backend/478)

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**Author:** [@matt.mccormick](https://discourse.itk.org/u/matt.mccormick)\
**Replies:** 1\
**Last updated:** [December 1, 2017, 7:23pm UTC](https://discourse.itk.org/t/multithreader-refactoring-to-allow-tbb-backend/478 "2017-12-01T19:23:58Z")

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Hi folks, Next week Friday, December 8th, 2017 11 AM EST Video conference: https://meet.google.com/nue-tugx-pxt we will be discussing a first pass at refactoring the itk::MultiThreader to allow a TBB backend, and we…

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## [Next ITK October Performance Confab](https://discourse.itk.org/t/next-itk-october-performance-confab/268)

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**Author:** [@matt.mccormick](https://discourse.itk.org/u/matt.mccormick)\
**Replies:** 1\
**Last updated:** [October 20, 2017, 12:59pm UTC](https://discourse.itk.org/t/next-itk-october-performance-confab/268 "2017-10-20T12:59:37Z")

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Hi folks, Let’s get together again to discuss progress on the ITK Performance efforts. When: Friday, October 20th, 11 AM EST Where: Google Meet https://meet.google.com/nue-tugx-pxt What: Discuss ITK Performance progr…