# arrow-contributors


11/25/2019, 7:25 PM
That is related too the non lazy folding of sequences because filterMap, which filter is defined with is map().foldLeft(). I'll add that too the ticket as well... We can solve those issues by explicitly overriding them, but tbh this isn't nice, sequences and the strict methods of our typeclasses don't play nicely when it comes to default implementations. Don't really know what the best thing is here, probably just going the long route and explicitly defining everything for sequences is best