Add a first performance test for DataView

and comparison with a JS implementation using TypedArray

Change-Id: Ifec9c19f23e182db25ad3e54edc3f60c6e6048f4
Reviewed-on: https://chromium-review.googlesource.com/1057729
Reviewed-by: Michael Stanton <mvstanton@chromium.org>
Commit-Queue: Théotime Grohens <theotime@google.com>
Cr-Commit-Position: refs/heads/master@{#53177}

test/js-perf-test/DataView/dataviewtest.js

@@ -0,0 +1,150 @@
+// Copyright 2018 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+new BenchmarkSuite('DataViewTest-DataView-BigEndian', [1000], [
+  new Benchmark('DataViewTest-DataView-BigEndian', false, false, 0, doTestDataViewBigEndian),
+]);
+
+new BenchmarkSuite('DataViewTest-DataView-LittleEndian', [1000], [
+  new Benchmark('DataViewTest-DataView-LittleEndian', false, false, 0, doTestDataViewLittleEndian),
+]);
+
+new BenchmarkSuite('DataViewTest-TypedArray-BigEndian', [1000], [
+  new Benchmark('DataViewTest-TypedArray-BigEndian', false, false, 0, doTestTypedArrayBigEndian),
+]);
+
+new BenchmarkSuite('DataViewTest-TypedArray-LittleEndian', [1000], [
+  new Benchmark('DataViewTest-TypedArray-LittleEndian', false, false, 0, doTestTypedArrayLittleEndian),
+]);
+
+function doTestDataViewBigEndian() {
+  doIterations(false, true);
+}
+
+function doTestDataViewLittleEndian() {
+  doIterations(true, true);
+}
+
+function doTestTypedArrayBigEndian() {
+  doIterations(false, false);
+}
+
+function doTestTypedArrayLittleEndian() {
+  doIterations(true, false);
+}
+
+function doIterations(littleEndian, dataView) {
+  var buffer = makeBuffer(1000, littleEndian);
+  var iterations = 10;
+  if (dataView) {
+    for (var i = 0; i < iterations; i++)
+      doOneIterationDV(buffer, littleEndian);
+  } else {
+    for (var i = 0; i < iterations; i++)
+      doOneIterationJS(buffer, littleEndian);
+  }
+}
+
+function makeBuffer(size, littleEndian) {
+  var buffer = new ArrayBuffer(size * 14);
+  var view = new DataView(buffer);
+  for (var i = 0; i < size; ++i) {
+    view.setInt8(i * 14, i);
+    view.setUint8(i * 14 + 1, i);
+    view.setInt16(i * 14 + 2, i * i, littleEndian);
+    view.setUint16(i * 14 + 4, i * i, littleEndian);
+    view.setInt32(i * 14 + 6, i * i * i, littleEndian);
+    view.setUint32(i * 14 + 10, i * i * i, littleEndian);
+  }
+  return buffer;
+}
+
+function doOneIterationDV(buffer, littleEndian) {
+  var xor = 0;
+  var view = new DataView(buffer);
+  for (var i = 0; i < view.byteLength; i += 14) {
+    xor ^= view.getInt8(i);
+    xor ^= view.getUint8(i + 1);
+    xor ^= view.getInt16(i + 2, littleEndian);
+    xor ^= view.getUint16(i + 4, littleEndian);
+    xor ^= view.getInt32(i + 6, littleEndian);
+    xor ^= view.getUint32(i + 10, littleEndian);
+  }
+}
+
+function doOneIterationJS(buffer, littleEndian) {
+  var xor = 0;
+  var reader;
+  if (littleEndian) {
+    reader = new LittleEndian(buffer);
+  } else {
+    reader = new BigEndian(buffer);
+  }
+  for (var i = 0; i < buffer.byteLength; i += 14) {
+    xor ^= reader.getInt8(i);
+    xor ^= reader.getUint8(i + 1);
+    xor ^= reader.getInt16(i + 2);
+    xor ^= reader.getUint16(i + 4);
+    xor ^= reader.getInt32(i + 6);
+    xor ^= reader.getUint32(i + 10);
+  }
+}
+
+function BigEndian(buffer, opt_byteOffset) {
+  this.uint8View_ = new Uint8Array(buffer, opt_byteOffset || 0);
+  this.int8View_ = new Int8Array(buffer, opt_byteOffset || 0);
+}
+BigEndian.prototype.getInt8 = function(byteOffset) {
+  return this.int8View_[byteOffset];
+};
+BigEndian.prototype.getUint8 = function(byteOffset) {
+  return this.uint8View_[byteOffset];
+};
+BigEndian.prototype.getInt16 = function(byteOffset) {
+  return this.uint8View_[byteOffset + 1] | (this.int8View_[byteOffset] << 8);
+};
+BigEndian.prototype.getUint16 = function(byteOffset) {
+  return this.uint8View_[byteOffset + 1] | (this.uint8View_[byteOffset] << 8);
+};
+BigEndian.prototype.getInt32 = function(byteOffset) {
+  return this.uint8View_[byteOffset + 3] |
+      (this.uint8View_[byteOffset + 2] << 8) |
+      (this.uint8View_[byteOffset + 1] << 16) |
+      (this.int8View_[byteOffset] << 24);
+};
+BigEndian.prototype.getUint32 = function(byteOffset) {
+  return this.uint8View_[byteOffset + 3] +
+      (this.uint8View_[byteOffset + 2] << 8) +
+      (this.uint8View_[byteOffset + 1] << 16) +
+      (this.uint8View_[byteOffset] * (1 << 24));
+};
+
+function LittleEndian(buffer, opt_byteOffset) {
+  this.uint8View_ = new Uint8Array(buffer, opt_byteOffset || 0);
+  this.int8View_ = new Int8Array(buffer, opt_byteOffset || 0);
+}
+LittleEndian.prototype.getInt8 = function(byteOffset) {
+  return this.int8View_[byteOffset];
+};
+LittleEndian.prototype.getUint8 = function(byteOffset) {
+  return this.uint8View_[byteOffset];
+};
+LittleEndian.prototype.getInt16 = function(byteOffset) {
+  return this.uint8View_[byteOffset] | (this.int8View_[byteOffset + 1] << 8);
+};
+LittleEndian.prototype.getUint16 = function(byteOffset) {
+  return this.uint8View_[byteOffset] | (this.uint8View_[byteOffset + 1] << 8);
+};
+LittleEndian.prototype.getInt32 = function(byteOffset) {
+  return this.uint8View_[byteOffset] |
+      (this.uint8View_[byteOffset + 1] << 8) |
+      (this.uint8View_[byteOffset + 2] << 16) |
+      (this.int8View_[byteOffset + 3] << 24);
+};
+LittleEndian.prototype.getUint32 = function(byteOffset) {
+  return this.uint8View_[byteOffset] +
+      (this.uint8View_[byteOffset + 1] << 8) +
+      (this.uint8View_[byteOffset + 2] << 16) +
+      (this.uint8View_[byteOffset + 3] * (1 << 24));
+};

test/js-perf-test/DataView/run.js

@@ -0,0 +1,24 @@
+// Copyright 2014 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+load('../base.js');
+load('dataviewtest.js');
+
+var success = true;
+
+function PrintResult(name, result) {
+  print(`DataView-${name}(Score): ${result}`);
+}
+
+function PrintError(name, error) {
+  PrintResult(name, error);
+  success = false;
+}
+
+
+BenchmarkSuite.config.doWarmup = undefined;
+BenchmarkSuite.config.doDeterministic = undefined;
+
+BenchmarkSuite.RunSuites({ NotifyResult: PrintResult,
+                           NotifyError: PrintError });

test/js-perf-test/JSTests.json

@@ -478,6 +478,19 @@
         {"name": "Object.hasOwnProperty--NE-el"}
       ]
     },
+    {
+      "name": "DataView",
+      "path": ["DataView"],
+      "main": "run.js",
+      "resources": ["dataviewtest.js"],
+      "results_regexp": "^DataView\\-%s\\(Score\\): (.+)$",
+      "tests": [
+	{"name": "DataViewTest-DataView-BigEndian"},
+	{"name": "DataViewTest-DataView-LittleEndian"},
+	{"name": "DataViewTest-TypedArray-BigEndian"},
+	{"name": "DataViewTest-TypedArray-LittleEndian"}
+      ]
+    },
     {
       "name": "TypedArrays",
       "path": ["TypedArrays"],