Bulkification

Official Docs

 Flow Bulkification

Blog Posts

Vibhor Goel on Bulk Inserts

Are Scheduled Flows Bulkified ? Let’s Find Out…!!

Videos

Demystifying Flow Bulkification 

How to bulkify a flow launched FROM Apex Trigger?

 How to bulkify Flow call from Apex?

Transactions 

Official Docs

Flow Transactions

Per-Transaction Limits

Blog Posts

The Commit Transaction Flow Extension

Transaction Boundaries (Apex and Flow)

Videos