qt 6.5.1 original

tests/benchmarks/corelib/io/qprocess/CMakeLists.txt

@@ -0,0 +1,5 @@
+# Copyright (C) 2022 The Qt Company Ltd.
+# SPDX-License-Identifier: BSD-3-Clause
+
+add_subdirectory(testProcessLoopback)
+add_subdirectory(test)

tests/benchmarks/corelib/io/qprocess/test/CMakeLists.txt

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+# Copyright (C) 2022 The Qt Company Ltd.
+# SPDX-License-Identifier: BSD-3-Clause
+
+#####################################################################
+## tst_bench_qprocess Binary:
+#####################################################################
+
+qt_internal_add_benchmark(tst_bench_qprocess
+    SOURCES
+        ../tst_bench_qprocess.cpp
+    LIBRARIES
+        Qt::CorePrivate
+        Qt::Test
+)

tests/benchmarks/corelib/io/qprocess/testProcessLoopback/CMakeLists.txt

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+# Copyright (C) 2022 The Qt Company Ltd.
+# SPDX-License-Identifier: BSD-3-Clause
+
+#####################################################################
+## testProcessLoopback Binary:
+#####################################################################
+
+add_executable(testProcessLoopback loopback.cpp)

tests/benchmarks/corelib/io/qprocess/testProcessLoopback/loopback.cpp

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+// Copyright (C) 2016 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0
+
+
+#include <stdio.h>
+
+int main()
+{
+    char buffer[1024];
+    for (;;) {
+        size_t num = fread(buffer, 1, sizeof(buffer), stdin);
+        if (num <= 0)
+            break;
+        fwrite(buffer, num, 1, stdout);
+        fflush(stdout);
+    }
+
+    return 0;
+}

tests/benchmarks/corelib/io/qprocess/tst_bench_qprocess.cpp

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+// Copyright (C) 2021 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0
+
+#include <QTest>
+#include <QSignalSpy>
+#include <QtCore/QProcess>
+#include <QtCore/QElapsedTimer>
+
+class tst_QProcess : public QObject
+{
+    Q_OBJECT
+
+private slots:
+
+    void echoTest_performance();
+};
+
+#ifdef Q_OS_WIN
+#  define EXE ".exe"
+#else
+#  define EXE ""
+#endif
+
+void tst_QProcess::echoTest_performance()
+{
+    QProcess process;
+    process.start(QFINDTESTDATA("../testProcessLoopback/testProcessLoopback" EXE));
+
+    QByteArray array;
+    array.resize(1024 * 1024);
+    for (int j = 0; j < array.size(); ++j)
+        array[j] = 'a' + (j % 20);
+
+    QVERIFY(process.waitForStarted());
+
+    QElapsedTimer stopWatch;
+    stopWatch.start();
+
+    qint64 totalBytes = 0;
+    QByteArray dump;
+    QSignalSpy readyReadSpy(&process, SIGNAL(readyRead()));
+    QVERIFY(readyReadSpy.isValid());
+    while (stopWatch.elapsed() < 2000) {
+        process.write(array);
+        while (process.bytesToWrite() > 0) {
+            int readCount = readyReadSpy.size();
+            QVERIFY(process.waitForBytesWritten(5000));
+            if (readyReadSpy.size() == readCount)
+                QVERIFY(process.waitForReadyRead(5000));
+        }
+
+        while (process.bytesAvailable() < array.size())
+            QVERIFY2(process.waitForReadyRead(5000), qPrintable(process.errorString()));
+        dump = process.readAll();
+        totalBytes += dump.size();
+    }
+
+    qDebug() << "Elapsed time:" << stopWatch.elapsed() << "ms;"
+             << "transfer rate:" << totalBytes / (1048.576) / stopWatch.elapsed()
+             << "MB/s";
+
+    for (int j = 0; j < array.size(); ++j)
+        QCOMPARE(char(dump.at(j)), char('a' + (j % 20)));
+
+    process.closeWriteChannel();
+    QVERIFY(process.waitForFinished());
+}
+
+QTEST_MAIN(tst_QProcess)
+#include "tst_bench_qprocess.moc"