jemalloc 测试

jemalloc安装

wget http://www.canonware.com/download/jemalloc/jemalloc-3.6.0.tar.bz2
tar xjf jemalloc-3.6.0.tar.bz2
cd jemalloc-3.6.0
./configure
make && make install
echo '/usr/local/lib' > /etc/ld.so.conf.d/local.conf
ldconfig

测试代码

/*=============================================================================
#     FileName: test.cpp
#         Desc: G
#       Author: Pugna
#        Email: 860009944@qq.com
#     HomePage: http://www.cnblogs.com/pugna/
#      Version: 0.0.1
#   LastChange: 2014-10-22 09:47:01
#      History:
=============================================================================*/
#include <malloc.h>
#include <stdio.h>
#include <sys/time.h>

static const int n=1000000;
static const int msecond=1000000;

int main(){
    void * p[n];
    struct timeval t_start,t_end;
    float timeuse;
    gettimeofday(&t_start,NULL);
    for(int i=0;i<n;i++){
        p[i]=malloc(10);
    }
    
    gettimeofday(&t_end,NULL);
    timeuse=msecond*(t_end.tv_sec-t_start.tv_sec)+t_end.tv_usec-t_start.tv_usec;
    timeuse/=msecond;
    printf("malloc use time:%f
",timeuse);
    gettimeofday(&t_start,NULL);
    for(int i=0;i<n;i++){
        p[i]=realloc(p[i],15);
    }
    gettimeofday(&t_end,NULL);
    timeuse=msecond*(t_end.tv_sec-t_start.tv_sec)+t_end.tv_usec-t_start.tv_usec;
    timeuse/=msecond;
    printf("realloc use time:%f
",timeuse);
    return 0;
}

没用jemalloc

使用jemalloc