qt-everywhere-src-5.14.1/qt3d/tests/benchmarks/core/qframeallocator/tst_bench_qframeallocator.cpp

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** Copyright (C) 2014 Klaralvdalens Datakonsult AB (KDAB).
** Contact: https://www.qt.io/licensing/
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#include <QObject>
#include <QtTest/QtTest>

#include <Qt3DCore/private/qframeallocator_p.h>

using namespace Qt3DCore;

class tst_QFrameAllocator : public QObject
{
    Q_OBJECT

private Q_SLOTS:
    void benchmarkAllocateSmall();
    void benchmarkAllocateBig();
    void benchmarkDeallocateSmall();
    void benchmarkDeallocateBig();
    void benchmarkAllocateRaw();
    void benchmarkDeallocateRaw();
};

namespace {
template<uint Size>
struct Object {
    char data[Size];
};

template<uint Size>
void benchmarkAlloc()
{
    QFrameAllocator allocator(128, 16, 128);
    QVector<Object<Size>*> items(10000);
    QBENCHMARK_ONCE {
        for (int i = 0; i < items.size(); ++i) {
            items[i] = allocator.allocate< Object<Size> >();
        }
    }
    for (Object<Size>* item : qAsConst(items)) {
        allocator.deallocate(item);
    }
}

template<uint Size>
void benchmarkDealloc()
{
    QFrameAllocator allocator(128, 16, 128);
    QVector<Object<Size>*> items(10000);
    for (int i = 0; i < items.size(); ++i) {
        items[i] = allocator.allocate< Object<Size> >();
    }
    QBENCHMARK_ONCE {
        for (Object<Size>* item : qAsConst(items)) {
            allocator.deallocate(item);
        }
    }
}
}

void tst_QFrameAllocator::benchmarkAllocateSmall()
{
    benchmarkAlloc<16>();
}

void tst_QFrameAllocator::benchmarkAllocateBig()
{
    benchmarkAlloc<128>();
}

void tst_QFrameAllocator::benchmarkDeallocateSmall()
{
    benchmarkDealloc<16>();
}

void tst_QFrameAllocator::benchmarkDeallocateBig()
{
    benchmarkDealloc<128>();
}

void tst_QFrameAllocator::benchmarkAllocateRaw()
{
    QFrameAllocator allocator(128, 16, 128);
    QVector<void*> items(10000);
    QBENCHMARK_ONCE {
        for (int i = 0; i < items.size(); ++i) {
            items[i] = allocator.allocateRawMemory(i % 128 + 1);
        }
    }
    for (int i = 0; i < items.size(); ++i) {
        allocator.deallocateRawMemory(items[i], i % 128 + 1);
    }
}

void tst_QFrameAllocator::benchmarkDeallocateRaw()
{
    QFrameAllocator allocator(128, 16, 128);
    QVector<void*> items(10000);
    for (int i = 0; i < items.size(); ++i) {
        items[i] = allocator.allocateRawMemory(i % 128 + 1);
    }
    QBENCHMARK_ONCE {
        for (int i = 0; i < items.size(); ++i) {
            allocator.deallocateRawMemory(items[i], i % 128 + 1);
        }
    }
}

QTEST_APPLESS_MAIN(tst_QFrameAllocator)
#include "tst_bench_qframeallocator.moc"