Abstract

We enhance the narrowing-driven partial evaluation scheme for lazy functional logic programs with the computation of symbolic costs. The enhanced scheme allows us to estimate the effects of the program transformer in a precise framework and, moreover, to quantify these effects. The considered costs are “symbolic” in the sense that they measure the number of basic operations performed during a computation rather than actual execution times. Our scheme may serve as a basis to develop speedup analyses and cost-guided transformers. A cost-augmented partial evaluator, which demonstrates the usefulness of our approach, has been implemented in the multi-paradigm language Curry.

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