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Using Heuristics to Automate Parameter Generation for Benchmarking of Java Methods

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Executive Summary

Automated generation of method parameters is needed in benchmarking scenarios where manual or random generation of parameters are not suitable, do not scale or are too costly. However, for a method to execute correctly, the generated input parameters must not violate implicit semantical constraints, such as ranges of numeric parameters or the maximum length of a collection. For most methods, such constraints have no formal documentation, and human-readable documentation of them is usually incomplete and ambiguous. Random search of appropriate parameter values is possible but extremely ineffective and does not pay respect to such implicit constraints. Also, the role of polymorphism and of the method invocation targets is often not taken into account.

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