Add gbenchmarks for strings extract function

cpp/benchmarks/CMakeLists.txt

@@ -183,6 +183,7 @@ ConfigureBench(STRINGS_BENCH
   string/convert_durations_benchmark.cpp
   string/convert_floats_benchmark.cpp
   string/copy_benchmark.cpp
+  string/extract_benchmark.cpp
   string/filter_benchmark.cpp
   string/find_benchmark.cpp
   string/replace_benchmark.cpp

cpp/benchmarks/string/extract_benchmark.cpp

@@ -0,0 +1,75 @@
+/*
+ * Copyright (c) 2021, NVIDIA CORPORATION.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <benchmark/benchmark.h>
+#include <benchmarks/common/generate_benchmark_input.hpp>
+#include <benchmarks/fixture/benchmark_fixture.hpp>
+#include <benchmarks/synchronization/synchronization.hpp>
+
+#include <cudf/strings/extract.hpp>
+#include <cudf/strings/strings_column_view.hpp>
+#include <cudf_test/column_wrapper.hpp>
+
+#include "string_bench_args.hpp"
+
+class StringExtract : public cudf::benchmark {
+};
+
+static void BM_extract(benchmark::State& state, int re_instructions)
+{
+  cudf::size_type const n_rows{static_cast<cudf::size_type>(state.range(0))};
+  cudf::size_type const max_str_length{static_cast<cudf::size_type>(state.range(1))};
+  data_profile table_profile;
+  table_profile.set_distribution_params(
+    cudf::type_id::STRING, distribution_id::NORMAL, 0, max_str_length);
+  auto const table =
+    create_random_table({cudf::type_id::STRING}, 1, row_count{n_rows}, table_profile);
+  cudf::strings_column_view input(table->view().column(0));
+  std::string const raw_pattern =
+    "1234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234"
+    "5678901234567890123456789012345678901234567890";
+  std::string const pattern = "(" + raw_pattern.substr(0, re_instructions) + ")";
+
+  for (auto _ : state) {
+    cuda_event_timer raii(state, true, 0);
+    auto results = cudf::strings::extract(input, pattern);
+  }
+
+  state.SetBytesProcessed(state.iterations() * input.chars_size());
+}
+
+static void generate_bench_args(benchmark::internal::Benchmark* b)
+{
+  int const min_rows   = 1 << 12;
+  int const max_rows   = 1 << 24;
+  int const row_mult   = 8;
+  int const min_rowlen = 1 << 5;
+  int const max_rowlen = 1 << 13;
+  int const len_mult   = 4;
+  generate_string_bench_args(b, min_rows, max_rows, row_mult, min_rowlen, max_rowlen, len_mult);
+}
+
+#define STRINGS_BENCHMARK_DEFINE(name, instructions)          \
+  BENCHMARK_DEFINE_F(StringExtract, name)                     \
+  (::benchmark::State & st) { BM_extract(st, instructions); } \
+  BENCHMARK_REGISTER_F(StringExtract, name)                   \
+    ->Apply(generate_bench_args)                              \
+    ->UseManualTime()                                         \
+    ->Unit(benchmark::kMillisecond);
+
+STRINGS_BENCHMARK_DEFINE(small, 4)
+STRINGS_BENCHMARK_DEFINE(medium, 48)
+STRINGS_BENCHMARK_DEFINE(large, 128)