Benchmark data of Sentinel cluster flow control

## Issue Description

Type: *bug report* or *feature request*

### Describe what happened (or what feature you want)

### Describe what you expected to happen

### How to reproduce it (as minimally and precisely as possible)

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### Tell us your environment

### Anything else we need to know?

The issue body is an unfilled report template and mentions no files, tests, entry points, reproduction steps, environment, or acceptance criteria. First clarify which Sentinel cluster flow-control scenarios and metrics should be benchmarked, then identify the relevant benchmark entry point and define the expected data and comparison conditions.

Written by the indexing model from the issue text.