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What is Hashcat and why should we care?

A password cracking utility, and because it was put forth as at least one example of a real-world application purported to perform just as well under OpenCL as CUDA. If true, it provides evidence against the claim "[OpenCL]'s always been 10-20% slower than CUDA".

Because its a performance critical application that has made the switch so is a good comparison.

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