Dump Read Slow

[suragnair]

When few barcodes are provided in barcode_file, the function is very slow since it populates barcode_dict_ref with all barcodes, even those not in barcode_file.

SnapTools/snaptools/snap.py

Line 784 in eecfa56

barcode_dict_ref = getBarcodesFromSnap(snap_file);

This can simply be improved by writing another function that also takes the barcode_list as input and only adds to dict if it is present in the barcode_list.

SnapTools/build/lib/snaptools/snap.py

Lines 116 to 118 in eecfa56

	for item in f["BD/name"]:
	item = item.decode();
	barcode_dict[item] = qc();

By doing this I receive almost 20x speedups for loading the barcode_dict_ref.