Add a V8Benchmark type to QmlBench import

This is going to be used to run v8-bench benchmarks using qmlbench as a harness.

This reverts commit 156cdf3b2ec213843f13240c160bcb25144a12c2.

Change-Id: Ieae04fd9fd968ac7bc419767afbf235b67242779
Reviewed-by: Simon Hausmann <simon.hausmann@qt.io>

3 files changed, 93 insertions, 0 deletions

diff --git a/src/V8Benchmark.qml b/src/V8Benchmark.qml
new file mode 100644
index 0000000..6062153
--- /dev/null
+++ b/src/V8Benchmark.qml
@@ -0,0 +1,90 @@
+/****************************************************************************
+**
+** Copyright (C) 2017 Crimson AS <info@crimson.no>
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of the qmlbench tool.
+**
+** $QT_BEGIN_LICENSE:GPL-EXCEPT$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3 as published by the Free Software
+** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-3.0.html.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+import QtQuick 2.0
+import QmlBench 1.0
+import "qrc:/3rdparty/v8-bench.js" as V8Bench
+
+// This is a harness suited for running a V8Bench suite and reporting a number.
+// We replace most of V8Bench's BenchmarkSuite (specifically, the step, run, etc
+// behavior) and do our own setup, running and teardown.
+//
+// This is a little unfortunate as it means that we can't report results that
+// directly compare with v8-bench.js, but hopefully our results will be more
+// stable (as we have less magic in how many iterations we run), and we shall
+// still provide useful information if a test regresses.
+Benchmark {
+    id: root
+
+    // The desired suite name (e.g. "Richards"). This is then found, and put
+    // into suite.
+    property var suiteName
+
+    // The found suite object
+    property var suite
+
+    Component.onCompleted: {
+        var suites = V8Bench.BenchmarkSuite.suites
+        // Find suite
+        for (var i = 0; i < suites.length; ++i) {
+            var potentialSuite = suites[i]
+            if (potentialSuite.name == root.suiteName) {
+                root.suite = potentialSuite
+                break;
+            }
+        }
+
+        // Set it up
+        for (var i = 0; i < suite.benchmarks.length; ++i) {
+            var benchmark = suite.benchmarks[i]
+            benchmark.Setup();
+
+            // And do a warmup iteration
+            benchmark.run();
+        }
+    }
+    Component.onDestruction: {
+        // Tear it down
+        for (var i = 0; i < suite.benchmarks.length; ++i) {
+            var benchmark = suite.benchmarks[i]
+            benchmark.TearDown();
+        }
+    }
+
+    // Run a tick of the test
+    onTChanged: {
+        for (var i = 0; i < suite.benchmarks.length; ++i) {
+            var benchmark = suite.benchmarks[i]
+
+            // Do a few iterations, so we report a meaningful number.
+            for (var j = 0; j < count; ++j) {
+                benchmark.run();
+            }
+        }
+    }
+}
diff --git a/src/main.cpp b/src/main.cpp
index 4133345..685c5a1 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -365,6 +365,7 @@ int main(int argc, char **argv)
     qmlRegisterType<QQuickView>();
     qmlRegisterType(QUrl("qrc:/Benchmark.qml"), "QmlBench", 1, 0, "Benchmark");
     qmlRegisterType(QUrl("qrc:/CreationBenchmark.qml"), "QmlBench", 1, 0, "CreationBenchmark");
+    qmlRegisterType(QUrl("qrc:/V8Benchmark.qml"), "QmlBench", 1, 0, "V8Benchmark");
     qmlRegisterType<TestModel>("QmlBench", 1, 0, "TestModel");
 
     QScopedPointer<QCoreApplication> app;
diff --git a/src/qmlbench.qrc b/src/qmlbench.qrc
index 63be422..b5e1ede 100644
--- a/src/qmlbench.qrc
+++ b/src/qmlbench.qrc
@@ -6,5 +6,7 @@
     <file>Shell_TotalFramesWithStaticCount.qml</file>
     <file>Benchmark.qml</file>
     <file>CreationBenchmark.qml</file>
+    <file>V8Benchmark.qml</file>
+    <file>3rdparty/v8-bench.js</file>
   </qresource>
 </RCC>