Can Esper handle a large number of statements?
The answer will depend on the types of statements required. The best approach may thus be to get familiar with the benchmark kit and use or customize it to test the specific type of statements needed. The observation will likely be that a larger number of statements have very little implication on Esper itself – although the memory footprint due to internal bookkeeping will slightly increase. The time to create new statements is usually very small, likely less then 1 millisecond or perhaps 2 to 3 milliseconds per statement. The engine has been tested with a very large number of statements (large > 100k). The engine is very efficient in matching incoming events to the statement(s) that need to see an event. Also note the performance tips section in the documentation that provides additional hints.
