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Decreased RAM usage for read_mne_epochs #327

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Merged
rickdott merged 1 commit into from
Aug 7, 2026
Merged

Decreased RAM usage for read_mne_epochs #327

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32 changes: 18 additions & 14 deletions hmp/io/mne_epochs.py
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Original file line number Diff line number Diff line change
Expand Up @@ -109,28 +109,32 @@ def read_mne_epochs(
],
)

epoch_data = [
utils.hmp_data_format(
epochs.get_data(copy=False).astype(dtype),
epochs.info['sfreq'],
epochs.tmin,
epochs.tmax,
epochs=[int(x) for x in valid_epoch_index],
channel=epochs.ch_names,
metadata=epochs.metadata,
)
for epochs, valid_epoch_index in epochs_list
]

# Recover info from first epochs object
info = epochs_list[0][0].info
final_prep_kwargs = deepcopy(preprocessing_kwargs)
final_prep_kwargs['sfreq'] = epochs_list[0][0].info['sfreq']
final_prep_kwargs['lowpass'] = epochs_list[0][0].info['lowpass']
final_prep_kwargs['highpass'] = epochs_list[0][0].info['highpass']

epoch_data = []
while epochs_list:
epochs, valid_epoch_index = epochs_list.pop(0)
epoch_data.append(
utils.hmp_data_format(
epochs.get_data(copy=False).astype(dtype),
epochs.info['sfreq'],
epochs.tmin,
epochs.tmax,
epochs=[int(x) for x in valid_epoch_index],
channel=epochs.ch_names,
metadata=epochs.metadata,
)
)
del epochs, valid_epoch_index


epoch_data = utils._concat_recordings(epoch_data, recordings,
{}, final_prep_kwargs, subj_name)

return epoch_data, info

def _process_epoch_dataset(recording, montage, verbose,
Expand Down