: Thanks. Is there any performance penalty vs. LongField? I don't need to
The other ones do normalization by converting to a Long internally -- i have no idea if you would see some micro performance benefit in doing the 0 stripping yourself. Sorting a LongField should take less RAM then a SortableLongField (because the Sortable*Field's use String based FieldCaches to support sortMissing*) but if you aren't doing any sorting or range queries on the field that shouldn't matter. -Hoss
