add benchmark for hash functions

be/src/bench/CMakeLists.txt

@@ -25,4 +25,5 @@ ADD_BE_BENCH(${SRC_DIR}/bench/parquet_writer_array_bench)
 #ADD_BE_BENCH(${SRC_DIR}/bench/block_cache_bench)
 ADD_BE_BENCH(${SRC_DIR}/bench/roaring_bitmap_mem_bench)
 ADD_BE_BENCH(${SRC_DIR}/bench/parquet_dict_decode_bench)
-ADD_BE_BENCH(${SRC_DIR}/bench/get_dict_codes_bench)
+ADD_BE_BENCH(${SRC_DIR}/bench/get_dict_codes_bench)
+ADD_BE_BENCH(${SRC_DIR}/bench/hash_functions_bench)

be/src/bench/hash_functions_bench.cpp

@@ -0,0 +1,91 @@
+// Copyright 2021-present StarRocks, Inc. All rights reserved.
+//
+// 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
+//
+//     https://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 <glog/logging.h>
+#include <gtest/gtest.h>
+#include <testutil/assert.h>
+
+#include <memory>
+#include <vector>
+
+#include "bench.h"
+#include "exprs/hash_functions.h"
+
+namespace starrocks {
+
+class HashFunctionsBench {
+public:
+    void SetUp();
+    void TearDown() {}
+
+    HashFunctionsBench(size_t num_column, size_t num_rows) : _num_column(num_column), _num_rows(num_rows) {}
+
+    void do_bench(benchmark::State& state, size_t num_column, bool test_default_hash);
+
+private:
+    const TypeDescriptor type_desc = TypeDescriptor(TYPE_VARCHAR);
+    size_t _num_column = 0;
+    size_t _num_rows = 0;
+    std::vector<ColumnPtr> _columns{};
+};
+
+void HashFunctionsBench::SetUp() {
+    for (int i = 0; i < _num_column; i++) {
+        auto columnPtr = Bench::create_random_column(type_desc, _num_rows, false, false);
+        _columns.push_back(std::move(columnPtr));
+    }
+}
+
+void HashFunctionsBench::do_bench(benchmark::State& state, size_t num_rows, bool test_default_hash) {
+    std::unique_ptr<FunctionContext> ctx(FunctionContext::create_test_context());
+    if (test_default_hash) {
+        ColumnPtr result = HashFunctions::murmur_hash3_32(ctx.get(), _columns).value();
+        auto column = ColumnHelper::cast_to<TYPE_INT>(result);
+    } else {
+        ColumnPtr result = HashFunctions::xx_hash3_64(ctx.get(), _columns).value();
+        auto column = ColumnHelper::cast_to<TYPE_BIGINT>(result);
+    }
+}
+
+static void BM_HashFunctions_Eval_Arg(benchmark::internal::Benchmark* b) {
+    b->Args({1, 10, true});
+    b->Args({1, 10, false});
+    b->Args({1, 100, true});
+    b->Args({1, 100, false});
+    b->Args({1, 10000, true});
+    b->Args({1, 10000, false});
+    b->Args({1, 1000000, true});
+    b->Args({1, 1000000, false});
+    b->Iterations(10000);
+}
+
+static void BM_HashFunctions_Eval(benchmark::State& state) {
+    size_t num_column = state.range(0);
+    size_t num_rows = state.range(1);
+    bool test_default_hash = state.range(3);
+
+    HashFunctionsBench hashFunctionsBench(num_column, num_rows);
+    hashFunctionsBench.SetUp();
+
+    for (auto _ : state) {
+        hashFunctionsBench.do_bench(state, num_rows, test_default_hash);
+    }
+}
+
+BENCHMARK(BM_HashFunctions_Eval)->Apply(BM_HashFunctions_Eval_Arg);
+
+} // namespace starrocks
+
+BENCHMARK_MAIN();