fatemehp commented on code in PR #14523:
URL: https://github.com/apache/arrow/pull/14523#discussion_r1006197628
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cpp/src/parquet/column_reader_benchmark.cc:
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@@ -0,0 +1,99 @@
+#include "benchmark/benchmark.h"
+#include "parquet/column_page.h"
+#include "parquet/column_reader.h"
+#include "parquet/schema.h"
+#include "parquet/test_util.h"
+#include "parquet/types.h"
+
+namespace parquet {
+
+using parquet::Repetition;
+using parquet::test::MakePages;
+using schema::NodePtr;
+
+namespace benchmark {
+
+static void BM_Skip(::benchmark::State& state) {
+ internal::LevelInfo level_info;
+ level_info.def_level = state.range(0);
+ level_info.rep_level = state.range(1);
+ // If true, tests skip, otherwise tests read.
+ const int skip = state.range(2);
+ const int batch_size = state.range(3);
+
+ Repetition::type repetition = Repetition::REQUIRED;
+ if (level_info.def_level > 0) {
+ repetition = Repetition::OPTIONAL;
+ }
+ if (level_info.rep_level > 0) {
+ repetition = Repetition::REPEATED;
+ }
+ NodePtr type = schema::Int32("b", repetition);
+ const ColumnDescriptor descr(type, level_info.def_level,
level_info.rep_level);
+
+ const int num_pages = 5;
+ const int levels_per_page = 100000;
+ // Vectors filled with random rep/defs and values to make pages.
+ std::vector<int32_t> values;
+ std::vector<int16_t> def_levels;
+ std::vector<int16_t> rep_levels;
+ std::vector<uint8_t> data_buffer;
+ std::vector<std::shared_ptr<Page>> pages;
+ MakePages<Int32Type>(&descr, num_pages, levels_per_page, def_levels,
rep_levels, values,
+ data_buffer, pages, Encoding::PLAIN);
+
+ // Vectors to read the values into.
+ std::vector<int32_t> read_values(batch_size, -1);
+ std::vector<int16_t> read_defs(batch_size, -1);
+ std::vector<int16_t> read_reps(batch_size, -1);
+
+ while (state.KeepRunning()) {
+ state.PauseTiming();
+ std::unique_ptr<PageReader> pager;
+ pager.reset(new test::MockPageReader(pages));
+ std::shared_ptr<ColumnReader> column_reader =
+ ColumnReader::Make(&descr, std::move(pager));
+ Int32Reader* reader = static_cast<Int32Reader*>(column_reader.get());
+ int values_count = -1;
+ state.ResumeTiming();
+ while (values_count != 0) {
+ if (skip == 1) {
+ values_count = reader->Skip(batch_size);
Review Comment:
Done.
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