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by dr_zoidberg
3303 days ago
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The one time I saw 100x increase in performance in Python-to-C (which was done through Cython) was in code that worked with strings calculating a machine-learning related distance between two strings. The code was doing a lot of accessing particular positions in the strings, which in pure python resulted in slow retrieval of every character (lots of .__getitem__ calls), which were optimized to having 2 predefined empty arrays (in heap, not stack, and their corresponding counters of valid items) and then walking the strings and storing the "hot" values in them. So it was a very specific case where we could get that 100x speedup at work. |
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