pitrou commented on code in PR #15140:
URL: https://github.com/apache/arrow/pull/15140#discussion_r1060528050
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cpp/src/parquet/encoding_benchmark.cc:
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@@ -452,6 +452,134 @@
BENCHMARK(BM_ByteStreamSplitEncode_Float_Avx512)->Range(MIN_RANGE, MAX_RANGE);
BENCHMARK(BM_ByteStreamSplitEncode_Double_Avx512)->Range(MIN_RANGE, MAX_RANGE);
#endif
+template <typename DType, typename NumberGenerator>
+static void BM_DeltaBitPackingEncode(benchmark::State& state, NumberGenerator
gen) {
+ using T = typename DType::c_type;
+ std::vector<T> values = gen(state.range(0));
+ std::vector<uint8_t> output(state.range(0) * sizeof(T), 0);
+ auto encoder = MakeTypedEncoder<DType>(Encoding::DELTA_BINARY_PACKED);
+ for (auto _ : state) {
+ encoder->Put(values.data(), static_cast<int>(values.size()));
+ encoder->FlushValues();
+ }
+ state.SetBytesProcessed(state.iterations() * values.size() * sizeof(T));
+}
+
+static void BM_DeltaBitPackingEncode_Int32_Equals(benchmark::State& state) {
+ BM_DeltaBitPackingEncode<Int32Type>(
+ state, [](size_t number) { return std::vector<int32_t>(number, 64); });
+}
+
+static void BM_DeltaBitPackingEncode_Int64_Equals(benchmark::State& state) {
Review Comment:
Do we expect different performance on this than on narrow data? Otherwise we
might as well not bother.
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