How to efficiently delete a node from LTM?

Answering my own question. It pays to read documentation ;-) If I pass expandSubccollections=true while making REST call, like https://lb.example.com/mgmt/tm/ltm/pool?expandSubcollections=true, then LTM returns all pools with all their members. I can get everything I need from a single GET instead of thousands. Takes me now ~3 seconds instead of 15+ minutes to delete node from remote LTM. Thank you all for your help!