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Posted to github@arrow.apache.org by GitBox <gi...@apache.org> on 2020/05/14 12:56:11 UTC
[GitHub] [arrow] pitrou commented on a change in pull request #7175: ARROW-8794: [C++] Expand performance coverage of parquet to arrow reading
pitrou commented on a change in pull request #7175:
URL: https://github.com/apache/arrow/pull/7175#discussion_r425110880
##########
File path: cpp/src/parquet/arrow/reader_writer_benchmark.cc
##########
@@ -118,13 +134,22 @@ std::shared_ptr<::arrow::Table> TableFromVector(
template <>
std::shared_ptr<::arrow::Table> TableFromVector<BooleanType>(const std::vector<bool>& vec,
- bool nullable) {
+ bool nullable,
+ int null_percentage) {
BooleanBuilder builder;
if (nullable) {
std::vector<bool> valid_bytes(BENCHMARK_SIZE, 0);
- int n = {0};
- std::generate(valid_bytes.begin(), valid_bytes.end(),
- [&n] { return (n++ % 2) != 0; });
+ if (null_percentage == -1) {
Review comment:
Perhaps nulls generation can be factored out?
##########
File path: cpp/src/parquet/arrow/reader_writer_benchmark.cc
##########
@@ -95,15 +97,29 @@ void SetBytesProcessed(::benchmark::State& state) {
state.SetBytesProcessed(bytes_processed);
}
+constexpr int64_t kAlternatingOrNa = -1;
+
template <typename ParquetType>
std::shared_ptr<::arrow::Table> TableFromVector(
- const std::vector<typename ParquetType::c_type>& vec, bool nullable) {
+ const std::vector<typename ParquetType::c_type>& vec, bool nullable,
+ int null_percentage = kAlternatingOrNa) {
+ if (!nullable) {
+ DCHECK(null_percentage = kAlternatingOrNa);
+ }
std::shared_ptr<::arrow::DataType> type = std::make_shared<ArrowType<ParquetType>>();
NumericBuilder<ArrowType<ParquetType>> builder;
if (nullable) {
std::vector<uint8_t> valid_bytes(BENCHMARK_SIZE, 0);
- int n = {0};
- std::generate(valid_bytes.begin(), valid_bytes.end(), [&n] { return n++ % 2; });
+ if (null_percentage == -1) {
Review comment:
Should this be `kAlternatingOrNa`?
##########
File path: cpp/src/parquet/arrow/reader_writer_benchmark.cc
##########
@@ -187,17 +219,56 @@ static void BM_ReadColumn(::benchmark::State& state) {
SetBytesProcessed<nullable, ParquetType>(state);
}
-BENCHMARK_TEMPLATE2(BM_ReadColumn, false, Int32Type);
-BENCHMARK_TEMPLATE2(BM_ReadColumn, true, Int32Type);
-
-BENCHMARK_TEMPLATE2(BM_ReadColumn, false, Int64Type);
-BENCHMARK_TEMPLATE2(BM_ReadColumn, true, Int64Type);
-
-BENCHMARK_TEMPLATE2(BM_ReadColumn, false, DoubleType);
-BENCHMARK_TEMPLATE2(BM_ReadColumn, true, DoubleType);
-
-BENCHMARK_TEMPLATE2(BM_ReadColumn, false, BooleanType);
-BENCHMARK_TEMPLATE2(BM_ReadColumn, true, BooleanType);
+BENCHMARK_TEMPLATE2(BM_ReadColumn, false, Int32Type)
+ ->Args({/*null_percentage=*/kAlternatingOrNa, 1})
+ ->Args({/*null_percentage=*/kAlternatingOrNa, 10})
+ ->Args({/*null_percentage=*/kAlternatingOrNa, 50});
+
+BENCHMARK_TEMPLATE2(BM_ReadColumn, true, Int32Type)
+ ->Args({/*null_percentage=*/kAlternatingOrNa, /*first_value_percentage=*/0})
Review comment:
Can you add a comment why we're varying `first_value_percentage`? (trigger RLE perhaps?)
##########
File path: cpp/src/parquet/arrow/reader_writer_benchmark.cc
##########
@@ -187,17 +219,56 @@ static void BM_ReadColumn(::benchmark::State& state) {
SetBytesProcessed<nullable, ParquetType>(state);
}
-BENCHMARK_TEMPLATE2(BM_ReadColumn, false, Int32Type);
-BENCHMARK_TEMPLATE2(BM_ReadColumn, true, Int32Type);
-
-BENCHMARK_TEMPLATE2(BM_ReadColumn, false, Int64Type);
-BENCHMARK_TEMPLATE2(BM_ReadColumn, true, Int64Type);
-
-BENCHMARK_TEMPLATE2(BM_ReadColumn, false, DoubleType);
-BENCHMARK_TEMPLATE2(BM_ReadColumn, true, DoubleType);
-
-BENCHMARK_TEMPLATE2(BM_ReadColumn, false, BooleanType);
-BENCHMARK_TEMPLATE2(BM_ReadColumn, true, BooleanType);
+BENCHMARK_TEMPLATE2(BM_ReadColumn, false, Int32Type)
+ ->Args({/*null_percentage=*/kAlternatingOrNa, 1})
+ ->Args({/*null_percentage=*/kAlternatingOrNa, 10})
+ ->Args({/*null_percentage=*/kAlternatingOrNa, 50});
+
+BENCHMARK_TEMPLATE2(BM_ReadColumn, true, Int32Type)
+ ->Args({/*null_percentage=*/kAlternatingOrNa, /*first_value_percentage=*/0})
+ ->Args({/*null_percentage=*/1, /*first_value_percentage=*/10})
+ ->Args({/*null_percentage=*/10, /*first_value_percentage=*/50})
+ ->Args({/*null_percentage=*/25, /*first_value_percentage=*/25})
+ ->Args({/*null_percentage=*/50, /*first_value_percentage=*/50})
+ ->Args({/*null_percentage=*/50, /*first_value_percentage=*/100})
+ ->Args({/*null_percentage=*/99, /*first_value_percentage=*/50})
+ ->Args({/*null_percentage=*/99, /*first_value_percentage=*/100});
+
+BENCHMARK_TEMPLATE2(BM_ReadColumn, false, Int64Type)
+ ->Args({/*null_percentage=*/kAlternatingOrNa, 1})
+ ->Args({/*null_percentage=*/kAlternatingOrNa, 10})
+ ->Args({/*null_percentage=*/kAlternatingOrNa, 50});
+BENCHMARK_TEMPLATE2(BM_ReadColumn, true, Int64Type)
+ ->Args({/*null_percentage=*/kAlternatingOrNa, /*first_value_percentage=*/0})
+ ->Args({/*null_percentage=*/1, /*first_value_percentage=*/10})
+ ->Args({/*null_percentage=*/5, /*first_value_percentage=*/10})
+ ->Args({/*null_percentage=*/10, /*first_value_percentage=*/50})
+ ->Args({/*null_percentage=*/25, /*first_value_percentage=*/25})
+ ->Args({/*null_percentage=*/30, /*first_value_percentage=*/25})
+ ->Args({/*null_percentage=*/35, /*first_value_percentage=*/25})
+ ->Args({/*null_percentage=*/45, /*first_value_percentage=*/25})
+ ->Args({/*null_percentage=*/50, /*first_value_percentage=*/50})
+ ->Args({/*null_percentage=*/50, /*first_value_percentage=*/1})
+ ->Args({/*null_percentage=*/75, /*first_value_percentage=*/1})
+ ->Args({/*null_percentage=*/99, /*first_value_percentage=*/50})
+ ->Args({/*null_percentage=*/99, /*first_value_percentage=*/100});
+
+BENCHMARK_TEMPLATE2(BM_ReadColumn, false, DoubleType)
+ ->Args({kAlternatingOrNa, 0})
+ ->Args({1, 20});
Review comment:
Why `1`?
##########
File path: cpp/src/parquet/arrow/reader_writer_benchmark.cc
##########
@@ -95,15 +97,29 @@ void SetBytesProcessed(::benchmark::State& state) {
state.SetBytesProcessed(bytes_processed);
}
+constexpr int64_t kAlternatingOrNa = -1;
+
template <typename ParquetType>
std::shared_ptr<::arrow::Table> TableFromVector(
- const std::vector<typename ParquetType::c_type>& vec, bool nullable) {
+ const std::vector<typename ParquetType::c_type>& vec, bool nullable,
+ int null_percentage = kAlternatingOrNa) {
Review comment:
`int64_t` above
##########
File path: cpp/src/parquet/arrow/reader_writer_benchmark.cc
##########
@@ -187,17 +219,56 @@ static void BM_ReadColumn(::benchmark::State& state) {
SetBytesProcessed<nullable, ParquetType>(state);
}
-BENCHMARK_TEMPLATE2(BM_ReadColumn, false, Int32Type);
-BENCHMARK_TEMPLATE2(BM_ReadColumn, true, Int32Type);
-
-BENCHMARK_TEMPLATE2(BM_ReadColumn, false, Int64Type);
-BENCHMARK_TEMPLATE2(BM_ReadColumn, true, Int64Type);
-
-BENCHMARK_TEMPLATE2(BM_ReadColumn, false, DoubleType);
-BENCHMARK_TEMPLATE2(BM_ReadColumn, true, DoubleType);
-
-BENCHMARK_TEMPLATE2(BM_ReadColumn, false, BooleanType);
-BENCHMARK_TEMPLATE2(BM_ReadColumn, true, BooleanType);
+BENCHMARK_TEMPLATE2(BM_ReadColumn, false, Int32Type)
+ ->Args({/*null_percentage=*/kAlternatingOrNa, 1})
+ ->Args({/*null_percentage=*/kAlternatingOrNa, 10})
+ ->Args({/*null_percentage=*/kAlternatingOrNa, 50});
+
+BENCHMARK_TEMPLATE2(BM_ReadColumn, true, Int32Type)
+ ->Args({/*null_percentage=*/kAlternatingOrNa, /*first_value_percentage=*/0})
+ ->Args({/*null_percentage=*/1, /*first_value_percentage=*/10})
+ ->Args({/*null_percentage=*/10, /*first_value_percentage=*/50})
+ ->Args({/*null_percentage=*/25, /*first_value_percentage=*/25})
+ ->Args({/*null_percentage=*/50, /*first_value_percentage=*/50})
+ ->Args({/*null_percentage=*/50, /*first_value_percentage=*/100})
+ ->Args({/*null_percentage=*/99, /*first_value_percentage=*/50})
+ ->Args({/*null_percentage=*/99, /*first_value_percentage=*/100});
+
+BENCHMARK_TEMPLATE2(BM_ReadColumn, false, Int64Type)
+ ->Args({/*null_percentage=*/kAlternatingOrNa, 1})
+ ->Args({/*null_percentage=*/kAlternatingOrNa, 10})
+ ->Args({/*null_percentage=*/kAlternatingOrNa, 50});
+BENCHMARK_TEMPLATE2(BM_ReadColumn, true, Int64Type)
+ ->Args({/*null_percentage=*/kAlternatingOrNa, /*first_value_percentage=*/0})
+ ->Args({/*null_percentage=*/1, /*first_value_percentage=*/10})
+ ->Args({/*null_percentage=*/5, /*first_value_percentage=*/10})
+ ->Args({/*null_percentage=*/10, /*first_value_percentage=*/50})
+ ->Args({/*null_percentage=*/25, /*first_value_percentage=*/25})
+ ->Args({/*null_percentage=*/30, /*first_value_percentage=*/25})
+ ->Args({/*null_percentage=*/35, /*first_value_percentage=*/25})
Review comment:
Do we need such a granularity in `null_percentage` values?
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