bkietz commented on a change in pull request #9670: URL: https://github.com/apache/arrow/pull/9670#discussion_r592361075
########## File path: cpp/src/arrow/dataset/file_benchmark.cc ########## @@ -0,0 +1,85 @@ +// Licensed to the Apache Software Foundation (ASF) under one +// or more contributor license agreements. See the NOTICE file +// distributed with this work for additional information +// regarding copyright ownership. The ASF licenses this file +// to you 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 "arrow/dataset/discovery.h" +#include "arrow/dataset/expression.h" +#include "arrow/dataset/file_base.h" +#include "arrow/dataset/file_ipc.h" +#include "arrow/dataset/partition.h" +#include "arrow/filesystem/mockfs.h" +#include "arrow/filesystem/test_util.h" +#include "arrow/testing/gtest_util.h" +#include "arrow/util/iterator.h" + +namespace arrow { +namespace dataset { + +static std::shared_ptr<Dataset> GetDataset() { + std::vector<fs::FileInfo> files; + std::vector<std::string> paths; + for (int a = 0; a < 100; a++) { + for (int b = 0; b < 100; b++) { + auto path = "a=" + std::to_string(a) + "/b=" + std::to_string(b) + "/data.feather"; + files.push_back(fs::File(path)); + paths.push_back(path); + } + } + EXPECT_OK_AND_ASSIGN(auto fs, + arrow::fs::internal::MockFileSystem::Make(fs::kNoTime, files)); + auto format = std::make_shared<IpcFileFormat>(); + FileSystemFactoryOptions options; + options.partitioning = HivePartitioning::MakeFactory(); + EXPECT_OK_AND_ASSIGN(auto factory, + FileSystemDatasetFactory::Make(fs, paths, format, options)); + FinishOptions finish_options; + finish_options.inspect_options.fragments = 0; + EXPECT_OK_AND_ASSIGN(auto dataset, factory->Finish(finish_options)); + return dataset; +} + +// A benchmark of filtering fragments in a dataset. +static void GetAllFragments(benchmark::State& state) { + auto dataset = GetDataset(); + for (auto _ : state) { + ASSERT_OK_AND_ASSIGN(auto fragments, dataset->GetFragments()); + ABORT_NOT_OK(fragments.Visit([](std::shared_ptr<Fragment>) { return Status::OK(); })); + } +} + +static void GetFilteredFragments(benchmark::State& state, Expression filter) { + auto dataset = GetDataset(); + ASSERT_OK_AND_ASSIGN(filter, filter.Bind(*dataset->schema())); + for (auto _ : state) { + ASSERT_OK_AND_ASSIGN(auto fragments, dataset->GetFragments(filter)); + ABORT_NOT_OK(fragments.Visit([](std::shared_ptr<Fragment>) { return Status::OK(); })); + } +} + +BENCHMARK(GetAllFragments); +// Drill down to a subtree. +BENCHMARK_CAPTURE(GetFilteredFragments, single_dir, equal(field_ref("a"), literal(90))); Review comment: ```suggestion // Drill down to a subtree. BENCHMARK_CAPTURE(GetFilteredFragments, single_dir, equal(field_ref("a"), literal(90))); // Drill down but not to a subtree BENCHMARK_CAPTURE(GetFilteredFragments, single_dir, equal(field_ref("b"), literal(90))); ``` ---------------------------------------------------------------- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. For queries about this service, please contact Infrastructure at: us...@infra.apache.org
