You can create any number of contexts. A context is a very lightweight object. Creating a context just allocates an identifier and creates a small object. Consequently, it is possible to create a thousand contexts with little performance penalty.

You can have any number of running contexts. A running context means that the context contains at least one monitor instance that has work to do. The more CPU cores you have, the more contexts it is practical to be running at a given time. The performance of multiple contexts running concurrently should scale approximately according to the number of CPU cores available on the host.

Because the cost of each context is low, it is possible to divide applications into the finest level of parallelism possible and let the correlator balance running those contexts across all CPU cores. This is true even if that means creating very many contexts.