# Limit the rate of rows

Control / flow

A variant of [Branch or loop](https://meridian.online/operations/branch-or-loop).

Pass rows downstream no faster than a set number per second or minute.

Page: <https://meridian.online/operations/branch-or-loop/limit-the-rate-of-rows>

## Status

Not built yet.

arcform does not do this yet; it would live in how a Protocol runs. [Its place on the roadmap](https://meridian.online/roadmap#branch-or-loop)

## What other tools call it

Meridian's classification; an independent blind rating agreed on 95.7% of 324 rows (variant, version 3).

- Alteryx Designer: [`Throttle`](https://help.alteryx.com/current/en/designer/tools/developer/throttle-tool.html) (read 2026-09-27)
- Duckle: [`Throttle`](https://github.com/slothflowlabs/duckle/blob/f85f8960edfb6efbf4cb89d58a7b32e16df0e867/frontend/src/workflow-ui/palette-data.ts) (read 2026-09-25)
- Apache NiFi: [`ControlRate`](https://nifi.apache.org/components/org.apache.nifi.processors.standard.ControlRate/) (read 2026-09-27)