Add string scalar replace benchmark

cpp/benchmarks/CMakeLists.txt

@@ -306,6 +306,7 @@ ConfigureBench(SUBWORD_TOKENIZER_BENCH "${SUBWORD_TOKENIZER_BENCH_SRC}")
 
 set(STRINGS_BENCH_SRC
   "${CMAKE_CURRENT_SOURCE_DIR}/string/case_benchmark.cpp"
-  "${CMAKE_CURRENT_SOURCE_DIR}/string/convert_durations_benchmark.cpp")
+  "${CMAKE_CURRENT_SOURCE_DIR}/string/convert_durations_benchmark.cpp"
+  "${CMAKE_CURRENT_SOURCE_DIR}/string/replace_scalar_benchmark.cpp")
 
 ConfigureBench(STRINGS_BENCH "${STRINGS_BENCH_SRC}")

cpp/benchmarks/string/replace_scalar_benchmark.cpp

@@ -0,0 +1,59 @@
+/*
+ * 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/scalar/scalar.hpp>
+#include <cudf/strings/replace.hpp>
+#include <cudf/strings/strings_column_view.hpp>
+
+class StringReplaceScalar : public cudf::benchmark {
+};
+
+static void BM_replace_scalar(benchmark::State& state)
+{
+  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));
+  cudf::string_scalar target("+");
+  cudf::string_scalar repl(" ");
+
+  for (auto _ : state) {
+    cuda_event_timer raii(state, true, 0);
+    cudf::strings::replace(input, target, repl);
+  }
+
+  state.SetBytesProcessed(state.iterations() * input.chars_size());
+}
+
+#define STRINGS_BENCHMARK_DEFINE(name)                 \
+  BENCHMARK_DEFINE_F(StringReplaceScalar, name)        \
+  (::benchmark::State & st) { BM_replace_scalar(st); } \
+  BENCHMARK_REGISTER_F(StringReplaceScalar, name)      \
+    ->RangeMultiplier(8)                               \
+    ->Ranges({{1 << 12, 1 << 18}, {1 << 5, 1 << 13}})  \
+    ->UseManualTime()                                  \
+    ->Unit(benchmark::kMillisecond);
+
+STRINGS_BENCHMARK_DEFINE(replace_scalar)