[stsffap]

While Restate is not optimized for analytical workloads it should be fast enough to also use it for simpler analytical workloads. Admittedly, it currently lacks a fluent API to express a dataflow graph but this is something that can be added on top of the existing APIs. As @gvdongen mentioned a scatter-gather like pattern can be easily expressed with Restate.

Regarding whether to parallelize or to batch, I think this strongly depends on what the actual operation involves. If it involves some CPU-intensive work like model inference, for example, then running more parallel tasks will probably speed things up.