3. 内存池效率测试
3.1 测试1：连续申请和连续释放
分别用内存池和new连续申请和连续释放大量的内存块，比较其运行速度，代码如下：
#include "stdafx.h"#include <iostream>#include <ctime>#include <vector>#include <boost/pool/pool.hpp>#include <boost/pool/object_pool.hpp>using namespace std;using namespace boost;const int MAXLENGTH = 100000;int main ( )
{
boost::pool<> p(sizeof(int)); int* vec1[MAXLENGTH]; int* vec2[MAXLENGTH]; clock_t clock_begin = clock(); for (int i = 0; i < MAXLENGTH; ++i)
{
vec1[i] = static_cast<int*>(p.malloc());
} for (int i = 0; i < MAXLENGTH; ++i) { p.free(vec1[i]); vec1[i] = NULL; } clock_t clock_end = clock(); cout<<"程序运行了 "<<clock_end-clock_begin<<" 个系统时钟"<<endl; clock_begin = clock(); for (int i = 0; i < MAXLENGTH; ++i) { vec2[i] = new int; } for (int i = 0; i < MAXLENGTH; ++i) { delete vec2[i]; vec2[i] = NULL; } clock_end = clock(); cout<<"程序运行了 "<<clock_end-clock_begin<<" 个系统时钟"<<endl; return 0;
}测试环境：VS2008，WindowXP SP2，Pentium 4 CPU双核，1.5GB内存。
结论：在连续申请和连续释放10万块内存的情况下，使用内存池耗时是使用new耗时的47.46%。
