eric-haibin-lin commented on issue #11299: row_sparse_pull,push row_sparse gradient is too slow,it has 10+ times difference URL: https://github.com/apache/incubator-mxnet/issues/11299#issuecomment-397846747 For minibatch training usually you derive rowids from the sparse data in the minibatch. For checkpointing, you need to pull all rowids. RowSparseNDArray doesn't have a prune method yet.. Maybe worth adding
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