Test Correctness, Test Performance
Even a program that has been carefully debugged so that it runs correctly may still contain errors or "features" that inhibit its performance with respect to execution speed, memory use, and so forth. Just as the ILOG CPLEX Interactive Optimizer can aid in your tests for correctness, it can also help you improve performance. It uses the same routines as the Component Libraries; consequently, it requires the same amount of time to solve a problem created by a callable-library application. We recommend that you use CPXwriteprob(), specifying a file type of SAV, to create a binary representation of the problem object of your application. Then read that representation into the Interactive Optimizer, and solve it there. If your application sets parameters, use the same settings in the Interactive Optimizer. If you find that your application takes significantly longer to solve the problem than does the Interactive Optimizer, then you can probably improve the performance of your application. In such a case, look closely at issues like memory fragmentation, unnecessary compiler options, inappropriate linker options, and programming practices that slow the application without causing incorrect results (such as operations within a loop that should be outside the loop).
