Improve performance for cudf::contains when searching for a scalar
#11202
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ttnghia
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3 - Ready for Review
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Here is the benchmark results, comparing the performance after vs before this PR: |
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Here is the original benchmark results: Before:After: |
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vuule
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Jul 6, 2022
cpp/benchmarks/search/search.cpp
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| BINARY_SEARCH_BENCHMARK_DEFINE(Column_AllValid, false) | ||
| BINARY_SEARCH_BENCHMARK_DEFINE(Column_HasNulls, true) |
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Not sure if intentional, but AFAICT we don't need separate definitions here. Validity can be another parameter, something like (if CreateRange is available in the version that we use)
->ArgsProduct({
benchmark::CreateRange(100000, 100000000, 10),
{0,1}
})
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Oh I didn't know that there is such way. I'm trying that...
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The current Google benchmark version used in cudf doesn't support CreateRange. I've created another PR to update it: #11209
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@vuule It seems that we can't upgrade Google benchmark, so unfortunately your suggestion here can't be worked on.
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I think we should look at this as an opportunity to convert this benchmark to nvbench. The reason not to allow something like #11209 is to encourage us to switch (which is also important for adjacent initiatives like building dashboards around better benchmark tracking).
bdice
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Jul 6, 2022
bdice
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karthikeyann
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Jul 7, 2022
karthikeyann
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bdice
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bdice
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@gpucibot merge |
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The current implementation of
cudf::contains(column_view, scalar)usesthrust::findandthrust::any_of(which also callsthrust::find_ifunder the hood). These thrust APIs were known to have performance regression (NVIDIA/cccl#720).This PR replaces
thrust::findandthrust::any_ofincudf::containsbythrust::count_if, which improves performance significantly.Benchmarks show that the run time can be reduced as much as 80% after modification, or up to 5X speedup.
Closes #3806.