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![William Hesse](/assets/img/avatar_default.png)
Publish some TypedData and ForLoop benchmarks to the Dart sdk repo. The benchmarks, authored by the Dart project, were previously in the benchmark-internal repository. Bug: b/298617448 Change-Id: I3327553ac5feca51a2f978e7d9b9c96fac2af121 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/323840 Commit-Queue: William Hesse <whesse@google.com> Reviewed-by: Jonas Termansen <sortie@google.com>
175 lines
3.8 KiB
Dart
175 lines
3.8 KiB
Dart
// Copyright (c) 2023, 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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import 'dart:typed_data';
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import 'package:benchmark_harness/benchmark_harness.dart';
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// Typed data block copy benchmark.
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const int size = 256 * 1024;
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class Int8ViewToInt8View extends BenchmarkBase {
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Int8ViewToInt8View() : super('TypedDataCopy.Int8ViewToInt8View');
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var a1;
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var a2;
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@override
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void setup() {
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final storage = Int8List(size);
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final buffer = storage.buffer;
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a1 = Int8List.view(buffer, 0, buffer.lengthInBytes);
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a2 = Int8List.view(buffer, 8, buffer.lengthInBytes - 8);
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for (int i = 0; i < a1.length; i++) {
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a1[i] = i;
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}
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}
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@override
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void run() {
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// Shift all bytes 8 positions nearer to the front.
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a1.setRange(0, a2.length, a2);
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final check = a1[a1.length - 8 - 1];
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if (check != -1) throw 'Bad $check';
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}
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}
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class Int8ViewToInt8 extends BenchmarkBase {
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Int8ViewToInt8() : super('TypedDataCopy.Int8ViewToInt8');
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var a1;
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var a2;
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@override
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void setup() {
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a1 = Int8List(size);
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final buffer = a1.buffer;
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a2 = Int8List.view(buffer, 8, buffer.lengthInBytes - 8);
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for (int i = 0; i < a1.length; i++) {
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a1[i] = i;
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}
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}
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@override
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void run() {
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// Shift all bytes 8 positions nearer to the front.
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a1.setRange(0, a2.length, a2);
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final check = a1[a1.length - 8 - 1];
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if (check != -1) {
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throw 'Bad $check';
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}
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}
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}
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class Int8ToInt8 extends BenchmarkBase {
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Int8ToInt8() : super('TypedDataCopy.Int8ToInt8');
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var a1;
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@override
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void setup() {
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a1 = Int8List(size);
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for (int i = 0; i < a1.length; i++) {
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a1[i] = i;
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}
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}
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@override
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void run() {
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// Shift all bytes 8 positions nearer to the front.
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a1.setRange(0, a1.length - 8, a1, 8);
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final check = a1[a1.length - 8 - 1];
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if (check != -1) {
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throw 'Bad $check';
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}
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}
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}
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class Int8ToUint8Clamped extends BenchmarkBase {
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Int8ToUint8Clamped() : super('TypedDataCopy.Int8ToUint8Clamped');
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var a1;
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var a2;
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@override
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void setup() {
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a1 = Uint8ClampedList(size);
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a2 = Int8List(size);
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for (int i = 0; i < a2.length; i++) {
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a2[i] = i;
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}
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}
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@override
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void run() {
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a1.setRange(0, a2.length, a2, 0);
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var check = a1[100];
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if (check != 100) {
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throw 'Bad $check';
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}
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check = a1[200];
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if (check != 0) {
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throw 'Bad $check';
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}
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}
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}
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class ByteSwap extends BenchmarkBase {
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ByteSwap() : super('TypedDataCopy.ByteSwap');
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final a8 = Int8List(size ~/ 16);
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@override
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void setup() {
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for (int i = 0; i < a8.length; i++) {
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a8[i] = i;
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}
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}
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void check(e0, e1, e2, e3) {
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final a0 = a8[0];
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final a1 = a8[1];
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final a2 = a8[2];
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final a3 = a8[3];
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if (a0 != e0 || a1 != e1 || a2 != e2 || a3 != e3) {
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throw 'Bad: $a0 $a1 $a2 $a3, expected $e0 $e1 $e2 $e3';
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}
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}
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@override
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void run() {
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final b = ByteData.view(a8.buffer);
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// Do several passes over the data, reading and writing in different widths
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// with different endianes.
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for (int i = 0; i < b.lengthInBytes; i += 4) {
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final e = b.getInt32(i); // Implicit big endian.
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b.setInt32(i, e, Endian.little);
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}
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check(3, 2, 1, 0);
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for (int i = 0; i < b.lengthInBytes; i += 2) {
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final e = b.getInt16(i, Endian.big);
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b.setInt16(i, e, Endian.little);
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}
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check(2, 3, 0, 1);
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for (int i = 0; i < b.lengthInBytes; i += 4) {
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final e = b.getUint32(i, Endian.little);
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b.setUint32(i, e); // Implicit big endian.
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}
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check(1, 0, 3, 2);
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for (int i = 0; i < b.lengthInBytes; i += 2) {
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final e = b.getUint16(i, Endian.little);
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b.setUint16(i, e, Endian.big);
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}
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check(0, 1, 2, 3); // Back to normal for the next run().
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}
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}
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