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It is advantageous to not only calculate the WCET of an application, but to also perform transformations to reduce the WCET since an application with a lower WCET will be less likely to violate its timing constraints. In this paper the authors describe an environment consisting of an interactive compilation system and a timing analyzer, where a user can interactively tune the WCET of an application. After each optimization phase is applied, the timing analyzer is automatically invoked to calculate the WCET of the function being tuned. Thus, a user can easily gauge the progress of reducing the WCET.
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