Performance Issues
Enforcing access control rules requires runtime checks. So it is natural to ask: What are the performance implications? Will these runtime checks degrade the runtime performance of my application significantly? What factors impact this degradation? What can I do to better understand and manage it?
To answer these questions, let us do a simple experiment and collect some performance data. We write a program that carries out an access controlled operation in a loop and run it under different policies. Listing 5-14 shows such a program that retrieves a system property, by invoking the static method getProperty() on the System class, a security sensitive operation, inside a loop and times the loop. Many rounds of measurements are ...
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