Observable Perf: Producer vs Firehose

```
r.u.PerfBaseline.observableConsumption                1  thrpt         5 16948592.620  1024031.596    ops/s
r.u.PerfBaseline.observableConsumption             1024  thrpt         5   244699.849     9240.018    ops/s
r.u.PerfBaseline.observableViaRange                   1  thrpt         5  9625876.332   480449.032    ops/s
r.u.PerfBaseline.observableViaRange                1024  thrpt         5    85453.456     1624.105    ops/s
```