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A Value Profiler for Assisting Object-Oriented Program Specialization

We present a value profiler for object-oriented programs that counts frequencies parameters to method calls. It is aimed at identifying methods that can be optimized by program spe- cialization techniques. By adding timestamps to objects, the profiler accurately tests equality over mutable objects on a per-method basis. Our experiments with a 64602 lines of Java program showed that the profile report can reduce effort at manually finding the target methods of optimiza- tion, which speeded the overall execution time up more than 10%.