Skip redundant dataset copy in apply_uprating#1523
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nwoodruff-co merged 1 commit intomainfrom Mar 10, 2026
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…_single_year_dataset Add copy=False parameter to apply_uprating; extend_single_year_dataset passes copy=False since it already copies each year individually via dataset.copy(). This removes the unnecessary deep copy of the entire multi-year dataset.
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Summary
copyparameter (defaultTrue) toapply_upratingso callers can opt out of the defensive deep copy of the full multi-year datasetextend_single_year_datasetnow passescopy=Falsesince it already copies each year individually viadataset.copy()— the second copy was redundantapply_upratingretain the existing safe-by-default behaviourThis is the proper upstream fix for the monkey-patch used in policyengine.py#251 to avoid the redundant copy in the UK simulation run.
Test plan