Robert Nystrom
e4c8b49dcc
Change-Id: I1362ada67a02b0ed352612fc29c727e94d8cd254 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/394901 Commit-Queue: Daco Harkes <dacoharkes@google.com> Auto-Submit: Bob Nystrom <rnystrom@google.com> Reviewed-by: Daco Harkes <dacoharkes@google.com>
113 lines
2.7 KiB
Dart
113 lines
2.7 KiB
Dart
// Copyright (c) 2022, the Dart project authors. Please see the AUTHORS file
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// for details. All rights reserved. Use of this source code is governed by a
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// BSD-style license that can be found in the LICENSE file.
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//
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// Generates both the dart and dart2 version of this benchmark.
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import 'dart:io';
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import 'dart:math';
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import 'package:path/path.dart' as path;
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const String benchmarkName = 'InstantiateTypeArgs';
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const List<int> instantiateCounts = [1, 5, 10, 100, 1000];
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void generateBenchmarkClassesAndUtilities(IOSink output, {required bool nnbd}) {
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output.writeln('''
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// Copyright (c) 2022, the Dart project authors. Please see the AUTHORS file
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// for details. All rights reserved. Use of this source code is governed by a
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// BSD-style license that can be found in the LICENSE file.
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//
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// This benchmark suite measures the overhead of instantiating type arguments,
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// with a particular aim of measuring the overhead of the caching mechanism.
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''');
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if (!nnbd) {
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output.writeln('''
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// @dart=2.9"
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''');
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}
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output.write('''
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import 'package:benchmark_harness/benchmark_harness.dart';
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void main() {
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''');
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for (final count in instantiateCounts) {
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output.write('''
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const Instantiate$count().report();
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''');
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}
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output.writeln('''
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}
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''');
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for (final count in instantiateCounts) {
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output.write('''
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class Instantiate$count extends BenchmarkBase {
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const Instantiate$count() : super('$benchmarkName.Instantiate$count');
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// Normalize the cost across the benchmarks by number of instantiations.
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@override
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void report() => emitter.emit(name, measure() / $count);
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@override
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void run() {
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''');
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for (int i = 0; i < count; i++) {
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output.write('''
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D.instantiate<C$i>();
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''');
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}
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output.writeln('''
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}
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}
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''');
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}
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output.write('''
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@pragma('vm:never-inline')
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@pragma('wasm:never-inline')
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@pragma('dart2js:never-inline')
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void blackhole<T>() => null;
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class D<T> {
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@pragma('vm:never-inline')
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@pragma('wasm:never-inline')
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@pragma('dart2js:never-inline')
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static void instantiate<S>() => blackhole<D<S>>();
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}
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''');
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final maxCount = instantiateCounts.reduce(max);
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for (int i = 0; i < maxCount; i++) {
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output.write('''
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class C$i {}
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''');
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}
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}
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void main() {
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final dartFilePath = path.join(
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path.dirname(Platform.script.path),
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'dart',
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'$benchmarkName.dart',
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);
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final dartSink = File(dartFilePath).openWrite();
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generateBenchmarkClassesAndUtilities(dartSink, nnbd: true);
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dartSink..flush();
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final dart2FilePath = path.join(
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path.dirname(Platform.script.path),
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'dart2',
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'$benchmarkName.dart',
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);
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final dart2Sink = File(dart2FilePath).openWrite();
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generateBenchmarkClassesAndUtilities(dart2Sink, nnbd: false);
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dart2Sink..flush();
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}
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