changlog:
issue: #151 bench模式支持回调函数 (pr #162)
issue: #159 提炼dataflow,filter,export等子包(pr #160 )
issue: #132 context对象包含编码器和解码器(pr #161 )
issue: #155 不设置解码器情况，优化执行效率(pr #163)
Gitee地址 https://gitee.com/guonaihong/gout
GitHub地址 https://github.com/guonaihong/gout