Debug low throughput

pmd.py

@@ -139,11 +139,14 @@ class DatasetsLoader(BaseLoader):
         else:
             assert self.num_proc > 1
             with Pool(self.num_proc) as pool:
-                batch_iterator = pool.imap(
+                # TODO @thomasw21 figure out if we care about imap.
+                batch_iterator = pool.imap_unordered(
                     partial(self._generate_rows_casted_pmd_features, dset=dataset),
                     range(0, dataset_size, self.batch_size_per_proc),
                 )
                 for rows_casted_pmd_features in batch_iterator:
+                    # DEBUG in order to know how fast we get the batches
+                    print("hello")
                     for row_casted_pmd_features in rows_casted_pmd_features:
                         yield row_casted_pmd_features