During GraphQL response building, Pipeloader routes ActiveRecord SELECTs through a libpq pipeline so a query tree resolves in roughly one round trip per level — with plain resolvers and plain models, no Futures, no dataloader.load, no resolver changes. Also ships Pipeloader::Batch: declarative batch-loaded associations and aggregates that eliminate N+1 in plain ActiveRecord traversal via AR's own Preloader.