Throughput benchmarks

Add benchmarks providing some baseline for performance. An example of this would be a producer that produces new snapshots at a rapid pace and seeing how long it takes for these changes to get sent to the client.

Should at the very least cover the new delta code (as it's the more performant protocol), but could also target sotw.

This would help us better understand the impact of larger changes (like #413) and the cost of per resource computation in delta.

@alecholmez