perf: avoid redundant data when saving Rotator models #229
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This PR improves disk space efficiency when saving the
Rotator
. Previously, the entire model, including itsPreprocessor
andWhitener
, was saved twice -- once for the original model and once for the Rotator. This resulted in redundant storage, particularly for theWhitener
, which can be large due to its transformation matrix.To address this, the PR no longer saves the entire original model. Instead, it creates a
DataContainer
for the original model and only copies the necessaryDataArrays
required by the Rotator, avoiding duplicate data.