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Fixes #741

@davidhassell davidhassell added enhancement New feature or request performance Relating to speed and memory performance labels Mar 20, 2024
@davidhassell davidhassell added this to the Next release milestone Mar 20, 2024
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@sadielbartholomew sadielbartholomew left a comment

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Seems logically sound and motivated. I have ran test_collapse (as well as the full test suite) both on this branch and on main and there is a significant speed improvement in each case, though I appreciate the main gains will be for more memory-intensive collapses.

All good, please merge.

@davidhassell davidhassell merged commit 5fed753 into NCAS-CMS:main Mar 21, 2024
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enhancement New feature or request performance Relating to speed and memory performance

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Improve cf.Field.collapse performance by lazily computing reduced axis coordinates

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