Update distinct/unique_count to experimental::row hasher/comparator
#12776
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Co-authored-by: Nghia Truong <nghiatruong.vn@gmail.com>
divyegala
added
feature request
vyasr
requested changes
Feb 16, 2023
Co-authored-by: Vyas Ramasubramani <vyas.ramasubramani@gmail.com>
ttnghia
approved these changes
Feb 21, 2023
karthikeyann
reviewed
Mar 1, 2023
…action-row-hasher
There are no benchmarks for these algorithms |
vyasr
approved these changes
Mar 7, 2023
| rmm::exec_policy(stream), | ||
| thrust::counting_iterator<cudf::size_type>(0), | ||
| thrust::counting_iterator<cudf::size_type>(keys.num_rows()), | ||
| [comp] __device__(cudf::size_type i) { return (i == 0 or not comp(i, i - 1)); }); |
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I assume that we can't capture the comparator by reference because it's a host object that needs to be copied to device for the lambda?
|
@vyasr and I followed up offline on his compile time question. |
|
/merge |
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This PR is a part of #11844
Checklist
Compilation Times
distinct_count.cuThis PR: 3m8.392s
main: 1m37.576s
unique_count.cuThis PR: 13m8.858s
main: 8m21.900s