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![Martin Kustermann](/assets/img/avatar_default.png)
This benchmark tests the performance of uninstantiated type literal usages. Issue https://github.com/dart-lang/sdk/issues/48757 TEST=ci Change-Id: I5eb881a2b8e397997505af41b24240afcbe9d1ac Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/242104 Reviewed-by: Alexander Markov <alexmarkov@google.com> Commit-Queue: Martin Kustermann <kustermann@google.com>
198 lines
5.5 KiB
Dart
198 lines
5.5 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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const int iterations = 100000;
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void main() {
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SyncCallBenchmark('TypeLiteral.GenericFunction.T.dynamic', () {
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for (int i = 0; i < iterations; ++i) {
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getT<dynamic>();
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}
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return iterations;
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}).report();
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SyncCallBenchmark('TypeLiteral.GenericFunction.T.int', () {
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for (int i = 0; i < iterations; ++i) {
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getT<int>();
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}
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return iterations;
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}).report();
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SyncCallBenchmark('TypeLiteral.GenericFunction.T.nullableInt', () {
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for (int i = 0; i < iterations; ++i) {
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getT<int?>();
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}
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return iterations;
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}).report();
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SyncCallBenchmark('TypeLiteral.GenericFunction.ListOfT.int', () {
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for (int i = 0; i < iterations; ++i) {
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getListOfT<int>();
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}
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return iterations;
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}).report();
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SyncCallBenchmark('TypeLiteral.GenericFunction.ListOfT.nullableInt', () {
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for (int i = 0; i < iterations; ++i) {
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getListOfT<int?>();
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}
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return iterations;
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}).report();
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SyncCallBenchmark('TypeLiteral.GenericFunction.NullableT.int', () {
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for (int i = 0; i < iterations; ++i) {
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getNullableT<int>();
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}
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return iterations;
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}).report();
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SyncCallBenchmark('TypeLiteral.GenericFunction.NullableT.nullableInt', () {
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for (int i = 0; i < iterations; ++i) {
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getNullableT<int?>();
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}
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return iterations;
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}).report();
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SyncCallBenchmark('TypeLiteral.GenericFunction.ListOfNullableT.int', () {
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for (int i = 0; i < iterations; ++i) {
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getListOfT<int>();
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}
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return iterations;
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}).report();
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SyncCallBenchmark('TypeLiteral.GenericFunction.ListOfNullableT.nullableInt',
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() {
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for (int i = 0; i < iterations; ++i) {
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getListOfNullableT<int?>();
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}
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return iterations;
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}).report();
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final foos = <Foo<Object?>>[
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Foo<int>(),
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Foo<int?>(),
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Foo<dynamic>(),
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];
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final Foo fooInt = foos[int.parse('0')];
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final Foo fooNullableInt = foos[int.parse('1')];
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final Foo fooDynamic = foos[int.parse('2')];
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SyncCallBenchmark('TypeLiteral.GenericClass.T.dynamic', () {
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for (int i = 0; i < iterations; ++i) {
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fooDynamic.getT();
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}
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return iterations;
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}).report();
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SyncCallBenchmark('TypeLiteral.GenericClass.T.int', () {
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for (int i = 0; i < iterations; ++i) {
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fooInt.getT();
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}
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return iterations;
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}).report();
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SyncCallBenchmark('TypeLiteral.GenericClass.T.nullableInt', () {
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for (int i = 0; i < iterations; ++i) {
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fooNullableInt.getT();
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}
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return iterations;
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}).report();
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SyncCallBenchmark('TypeLiteral.GenericClass.ListOfT.int', () {
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for (int i = 0; i < iterations; ++i) {
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fooInt.getListOfT();
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}
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return iterations;
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}).report();
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SyncCallBenchmark('TypeLiteral.GenericClass.ListOfT.nullableInt', () {
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for (int i = 0; i < iterations; ++i) {
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fooNullableInt.getListOfT();
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}
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return iterations;
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}).report();
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SyncCallBenchmark('TypeLiteral.GenericClass.NullableT.int', () {
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for (int i = 0; i < iterations; ++i) {
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fooInt.getNullableT();
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}
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return iterations;
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}).report();
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SyncCallBenchmark('TypeLiteral.GenericClass.NullableT.nullableInt', () {
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for (int i = 0; i < iterations; ++i) {
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fooNullableInt.getNullableT();
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}
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return iterations;
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}).report();
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SyncCallBenchmark('TypeLiteral.GenericClass.ListOfNullableT.int', () {
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for (int i = 0; i < iterations; ++i) {
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fooInt.getListOfT();
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}
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return iterations;
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}).report();
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SyncCallBenchmark('TypeLiteral.GenericClass.ListOfNullableT.nullableInt', () {
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for (int i = 0; i < iterations; ++i) {
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fooNullableInt.getListOfNullableT();
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}
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return iterations;
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}).report();
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}
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@pragma('vm:never-inline')
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@pragma('dart2js:noInline')
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Type getT<T>() => T;
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@pragma('vm:never-inline')
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@pragma('dart2js:noInline')
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Type getNullableT<T>() => MakeNullable<T?>;
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@pragma('vm:never-inline')
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@pragma('dart2js:noInline')
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Type getListOfT<T>() => List<T>;
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@pragma('vm:never-inline')
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@pragma('dart2js:noInline')
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Type getListOfNullableT<T>() => List<T?>;
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class Foo<T> {
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@pragma('vm:never-inline')
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@pragma('dart2js:noInline')
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Type getT() => T;
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@pragma('vm:never-inline')
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@pragma('dart2js:noInline')
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Type getNullableT() => MakeNullable<T?>;
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@pragma('vm:never-inline')
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@pragma('dart2js:noInline')
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Type getListOfT() => List<T>;
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@pragma('vm:never-inline')
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@pragma('dart2js:noInline')
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Type getListOfNullableT() => List<T?>;
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}
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typedef MakeNullable<X> = X?;
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// Same as from [Calls] benchmark.
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class SyncCallBenchmark {
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final String name;
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final int Function() performCalls;
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SyncCallBenchmark(this.name, this.performCalls);
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// Returns the number of nanoseconds per call.
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double measureFor(Duration duration) {
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final sw = Stopwatch()..start();
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final durationInMicroseconds = duration.inMicroseconds;
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int numberOfCalls = 0;
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int totalMicroseconds = 0;
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do {
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numberOfCalls += performCalls();
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totalMicroseconds = sw.elapsedMicroseconds;
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} while (totalMicroseconds < durationInMicroseconds);
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final int totalNanoseconds = sw.elapsed.inMicroseconds * 1000;
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return totalNanoseconds / numberOfCalls;
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}
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// Runs warmup phase, runs benchmark and reports result.
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void report() {
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// Warmup for 100 ms.
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measureFor(const Duration(milliseconds: 100));
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// Run benchmark for 2 seconds.
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final double nsPerCall = measureFor(const Duration(seconds: 2));
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// Report result.
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print('$name(RunTimeRaw): $nsPerCall ns.');
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}
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}
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