Event Management can process around 400 events per second on a Production instance configured to use all application nodes and with multiple scheduled workers (e.g. 2 per node). This is configured in the Event Management Properties page.
Non-Production (i.e. Dev) instances only have a single application node, so the only performance tuning you're able to do is increase the number of scheduled workers (e.g. to 4) however - at best - this will allow you to process around 100 events per second.
Non-Production instances are useful for configuring and testing event rules, but should not be used to evaluate event processing performance as the instance architecture is not equivalent to a Production instance.
