I don't recall who originally suggested this (lmk if it was you 🙂 ), but throughput and performance have come up quite a lot, especially related to Klaviyo which has a pretty low per-call record limit of 100. Logged here for continued future discussion, this proposal (open to MRs from community) would allow async REST calls in parallel to other calls and in parallel to processing the results of each call: Support for async REST calls (#184) · Issues · Meltano / Meltano SDK for Singer Taps and Targets · GitLab