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Use warp per string for long strings in cudf::strings::contains() (#1…
…0739) Improves the performance on `cudf::strings::contains()` for long strings. This executes a warp per string to match a target over sections of a single string in parallel. The benchmark showed this to be faster than the current implementation only for longer strings (greater than 64 bytes). It also proved somewhat faster and more consistent than a pure character-parallel approach. This change may also help improve the performance of the regex `contains_re()` function in the future. Authors: - David Wendt (https://github.com/davidwendt) Approvers: - Mike Wilson (https://github.com/hyperbolic2346) - Bradley Dice (https://github.com/bdice) URL: #10739
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