PERF: CategoricalIndex.get_loc should avoid expensive cast of .codes to int64#21699

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topper-123 wants to merge 9 commits intopandas-dev:masterfrom

topper-123:CategoricalIndex.get_loc

Commits on Sep 23, 2018

Commits on Sep 24, 2018

adjust for that is_monotonic uses fused types
topper-123
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