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License: BSD 2-Clause "Simplified" License
heapsort implementations
License: BSD 2-Clause "Simplified" License
Thanks for making this available, and your blog post of course. I've been watching Robert Sedgewick's lectures on Algorithms (which is how I stumbled upon your blog ๐), and while he praises the benefits of heapsort, he also mentions as a downside that it "makes poor use of cache memory". More specific:
... doesn't have local memory reference like quicksort does (always referring to something that's nearby something else that was just referred to), whereas heapsort is going to look far away from the current place as it goes down the tree, and that makes it slower in a lot of situations.
On your blog post you do mention it beats quicksort for certain input sizes. Have you tested it for very large datasets (spanning several pages of memory)? Very interested to know if its limited locality of reference has a non-trivial impact on performance.
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