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Branched from the monolithic repo, Qt master branch, at commit
896db169ea224deb96c59ce8af800d019de63f12

1 files changed, 390 insertions, 0 deletions

diff --git a/tests/benchmarks/corelib/tools/qvector/main.cpp b/tests/benchmarks/corelib/tools/qvector/main.cpp
new file mode 100644
index 0000000000..98a6bb2b2f
--- /dev/null
+++ b/tests/benchmarks/corelib/tools/qvector/main.cpp
@@ -0,0 +1,390 @@
+/****************************************************************************
+**
+** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the test suite of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the Technology Preview License Agreement accompanying
+** this package.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain additional
+** rights.  These rights are described in the Nokia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include <QVector>
+#include <QDebug>
+#include <QtTest>
+
+#include "qrawvector.h"
+
+#include <vector>
+
+/*
+
+Code generated by g++ 4.3.3.  The lines marked with '!' are the ones that get
+executed inside the loop. Using the external 's' causes some load making the
+loop resembling a 'simple inner loop' in 'real' applications.
+
+
+qvector_mutable_read_access:
+
+.L166:
+!       movl    -16(%ebp), %edx
+!       movl    (%edx), %eax
+!       subl    $1, %eax
+!       je      .L165
+            movl    4(%edx), %eax
+            movl    %eax, 8(%esp)
+            movl    8(%edx), %eax
+            movl    %esi, (%esp)
+            movl    %eax, 4(%esp)
+            call    _ZN4myns7QVectorIdE7reallocEii
+.L165:
+!       movl    -16(%ebp), %eax
+!       fldl    s
+!       faddl   16(%eax,%ebx,8)
+!       addl    $1, %ebx
+!       cmpl    $10000, %ebx
+!       fstpl   s
+!       jne     .L166
+
+
+qvector_const_read_access:
+
+        movl    -16(%ebp), %edx
+        xorl    %eax, %eax
+.L183:
+!       fldl    s
+!       faddl   16(%edx,%eax,8) 
+!       addl    $1, %eax
+!       cmpl    $10000, %eax
+!       fstpl   s
+!       jne     .L183
+
+
+stdvector_const_read_access and stdvector_mutable_read_access and
+qrawvector_const_read_access and qrawvector_mutable_read_access:
+
+        xorl    %eax, %eax
+.L64:
+!       fldl    s
+!       faddl   (%ebx,%eax,8)
+!       addl    $1, %eax
+!       cmpl    $10000, %eax
+!       fstpl   s
+!       jne     .L64
+
+
+
+Behaviour varies with small modifications, but total is more or
+less stable:
+
+qrawvector_mutable_read_access, using  size() instead of N:
+
+.L145:
+!       faddl   (%edx,%eax,8)
+!       addl    $1, %eax
+!       cmpl    %ecx, %eax
+!       fstl    s
+!       jne     .L145
+!       fstp    %st(0)
+
+
+qrawvector_mutable_read_access, counting backward:
+
+.L145:
+!       faddl   (%edx,%eax,8)
+!       subl    $1, %eax
+!       cmpl    $-1, %eax
+!       fstl    s
+!       jne     .L145
+
+
+qrawvector_mutable_read_access, counting backward, using size():
+
+.L146:
+!       faddl   (%edx)
+!       addl    $1, %eax
+!       subl    $8, %edx
+!       cmpl    %ecx, %eax
+!       fstl    s
+!       jne     .L146
+
+
+
+*/
+
+
+/*
+
+////////////////////////////////////////////////////////////////////
+
+time ./tst_vector qvector_const_read_access
+real    0m12.912s
+user    0m12.401s
+sys     0m0.016s
+
+time ./tst_vector qvector_mutable_read_access
+real    0m38.566s
+user    0m36.754s
+sys     0m0.008s
+
+
+time ./tst_vector stdvector_mutable_read_access
+real    0m12.736s
+user    0m12.665s
+sys     0m0.004s
+
+
+////////////////////////////////////////////////////////////////////
+
+time ./tst_vector qvector_fill_and_return
+real    0m28.778s
+user    0m28.522s
+sys     0m0.012s
+
+time ./tst_vector stdvector_fill_and_return
+real    0m26.675s
+user    0m26.558s
+sys     0m0.012s
+
+time ./tst_vector qrawvector_fill_and_return
+real    0m23.370s
+user    0m23.269s
+sys     0m0.008s
+
+
+
+*/
+
+
+
+#define TEST_RETURN 1
+
+// For some reason, both 'plain' and '-callgrind' create strange results
+// (like varying instruction count for the same assembly code)
+// So replace it by a plain loop and measure wall clock time.
+//#undef QBENCHMARK
+//#define QBENCHMARK for (int j = 0; j != 10000; ++j)
+
+class tst_QVector: public QObject
+{
+    Q_OBJECT
+
+private slots:
+    void calibration();
+
+    // Pure Qt solution
+    void qvector_separator() { qWarning() << "QVector results: "; }
+    void qvector_const_read_access();
+    void qvector_mutable_read_access();
+    #ifdef TEST_RETURN
+    void qvector_fill_and_return();
+    #endif
+
+    // Purre Standard solution
+    void stdvector() { qWarning() << "std::vector results: "; }
+    void stdvector_const_read_access();
+    void stdvector_mutable_read_access();
+    #ifdef TEST_RETURN
+    void stdvector_fill_and_return();
+    #endif
+
+    // Build using std, pass as QVector
+    void mixedvector() { qWarning() << "mixed results: "; }
+    #ifdef TEST_RETURN
+    void mixedvector_fill_and_return();
+    #endif
+
+    // Alternative implementation
+    void qrawvector_separator() { qWarning() << "QRawVector results: "; }
+    void qrawvector_const_read_access();
+    void qrawvector_mutable_read_access();
+    #ifdef TEST_RETURN
+    void qrawvector_fill_and_return();
+    #endif
+};
+
+const int N = 1000000;
+extern double s;
+
+void tst_QVector::calibration()
+{
+    QVector<double> v(N);
+    for (int i = 0; i != N; ++i)
+        v[i] = i;
+    QBENCHMARK {
+        for (int i = 0; i != N; ++i)
+            s += i;
+    }
+}
+
+///////////////////// QVector /////////////////////
+
+void tst_QVector::qvector_const_read_access()
+{
+    QVector<double> v(N);
+    for (int i = 0; i != N; ++i)
+        v[i] = i;
+
+    const QVector<double> &vc = v;
+    QBENCHMARK {
+        for (int i = 0; i != N; ++i)
+            s += vc[i];
+    }
+}
+
+void tst_QVector::qvector_mutable_read_access()
+{
+    QVector<double> v(N);
+    for (int i = 0; i != N; ++i)
+        v[i] = i;
+
+    QBENCHMARK {
+        for (int i = 0; i != N; ++i)
+            s += v[i];
+    }
+}
+
+#ifdef TEST_RETURN
+extern QVector<double> qvector_fill_and_return_helper();
+
+void tst_QVector::qvector_fill_and_return()
+{
+    QBENCHMARK {
+        QVector<double> v = qvector_fill_and_return_helper();
+        s += v[1];
+    }
+}
+
+#endif
+
+
+///////////////////// QRawVector /////////////////////
+
+void tst_QVector::qrawvector_const_read_access()
+{
+    QRawVector<double> v(N);
+    for (int i = 0; i != N; ++i)
+        v[i] = i;
+
+    const QRawVector<double> &vc = v;
+    QBENCHMARK {
+        for (int i = vc.size(); --i >= 0;)
+            s += vc[i];
+    }
+}
+
+void tst_QVector::qrawvector_mutable_read_access()
+{
+    QRawVector<double> v(N);
+    for (int i = 0; i != N; ++i)
+        v[i] = i;
+
+    QBENCHMARK {
+        for (int i = 0; i != N; ++i)
+            s += v[i];
+    }
+}
+
+#ifdef TEST_RETURN
+extern QVector<double> qrawvector_fill_and_return_helper();
+
+void tst_QVector::qrawvector_fill_and_return()
+{
+    QBENCHMARK {
+        QVector<double> v = qrawvector_fill_and_return_helper();
+        s += v[1];
+    }
+}
+
+#endif
+
+
+///////////////////// std::vector /////////////////////
+
+void tst_QVector::stdvector_const_read_access()
+{
+    std::vector<double> v(N);
+    for (int i = 0; i != N; ++i)
+        v[i] = i;
+
+    const std::vector<double> &vc = v;
+    QBENCHMARK {
+        for (int i = 0; i != N; ++i)
+            s += vc[i];
+    }
+}
+
+void tst_QVector::stdvector_mutable_read_access()
+{
+    std::vector<double> v(N);
+    for (int i = 0; i != N; ++i)
+        v[i] = i;
+
+    QBENCHMARK {
+        for (int i = 0; i != N; ++i)
+            s += v[i];
+    }
+}
+
+#ifdef TEST_RETURN
+extern std::vector<double> stdvector_fill_and_return_helper();
+
+void tst_QVector::stdvector_fill_and_return()
+{
+    QBENCHMARK {
+        std::vector<double> v = stdvector_fill_and_return_helper();
+        s += v[1];
+    }
+}
+
+#endif
+
+///////////////////// mixed vector /////////////////////
+
+
+#ifdef TEST_RETURN
+extern QVector<double> mixedvector_fill_and_return_helper();
+
+void tst_QVector::mixedvector_fill_and_return()
+{
+    QBENCHMARK {
+        std::vector<double> v = stdvector_fill_and_return_helper();
+        s += v[1];
+    }
+}
+
+#endif
+
+QTEST_MAIN(tst_QVector)
+
+#include "main.moc"