activemq-cpp/src/test-benchmarks/decaf/io/ByteArrayInputStreamBenchmark.cpp

/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#include "ByteArrayInputStreamBenchmark.h"

using namespace decaf;
using namespace decaf::io;

////////////////////////////////////////////////////////////////////////////////
const int ByteArrayInputStreamBenchmark::bufferSize = 200000;

////////////////////////////////////////////////////////////////////////////////
ByteArrayInputStreamBenchmark::ByteArrayInputStreamBenchmark() : buffer(), stlBuffer() {
}

////////////////////////////////////////////////////////////////////////////////
ByteArrayInputStreamBenchmark::~ByteArrayInputStreamBenchmark() {
}

////////////////////////////////////////////////////////////////////////////////
void ByteArrayInputStreamBenchmark::setUp() {

    buffer = new unsigned char[bufferSize];

    // init to full String Buffer
    stlBuffer.reserve(bufferSize);
    for (int ix = 0; ix < bufferSize - 1; ++ix) {
        buffer[ix] = 65;
        stlBuffer.push_back(65);
    }
    buffer[bufferSize - 1] = 0;
}

////////////////////////////////////////////////////////////////////////////////
void ByteArrayInputStreamBenchmark::tearDown(){

    delete [] buffer;
}

////////////////////////////////////////////////////////////////////////////////
void ByteArrayInputStreamBenchmark::run() {

    int numRuns = 25;

    std::vector<unsigned char> bucket(bufferSize);
    ByteArrayInputStream bis(buffer, bufferSize);

    for (int iy = 0; iy < numRuns; ++iy) {
        ByteArrayInputStream local(buffer, bufferSize);
    }

    for (int iy = 0; iy < numRuns; ++iy) {

        for (std::size_t iz = 0; iz < bufferSize; ++iz) {
            bucket[iy] = (unsigned char) bis.read();
        }
        bis.reset();
    }

    for (int iy = 0; iy < numRuns; ++iy) {
        bis.read(&bucket[0], bufferSize, 0, bufferSize);
        bis.reset();
    }
}