[PATCH] D112651: [llvm-reduce] Add flag to start at finer granularity

[Dwight Guth via Phabricator via llvm-commits]

dwightguth added a comment.

I mean, I imagine the time it takes depends substantially on the interestingness test you specify and how much of the file is in fact interesting, but the use case I am using it for, where I have a large llvm bitcode file that I need to link and execute in order to test whether or not it is interesting, has taken hours upon hours just to run a couple of the delta passes. I assume that's because the algorithm is actually O((n^2)*log(n)), which doesn't perform particularly great on large values of N.


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https://reviews.llvm.org/D112651