Elide bound checks #21
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Add assert checks for checking if input vectors have the same length. This will help the rust compiler later to elide bound checks.
Use zipped iterators instead of indexing to elide bound checks.
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Do you have benchmarks that show that this is faster? Just curious |
Author
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No, I don't have a benchmark that shows a real difference, but I assume the difference will be hardly noticeable as currently sorting input/output will probably dominate most of the running time. |
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Rewrite all functions in sorts.rs to use zipped iterators to iterate over multiple vectors, instead of using indexing operations to get the values.
When using indexing operations into vectors, the rust compiler will do bound checks to see if it is not indexing past the end of the vector.
By first check that all input vectors have the same length, and by using zipped iterators over the vectors the rust compiler can elide all those bound checks and should be able to generate faster code.