PHP性能监控测试－－－－Xhprof
开始工作到现在，除了做新手任务，基本上都是和服务器端打交道，做前端的时间很短
目前公司的性能监控和测试：Xhprof和ab测试
Xhprof----facebook开源的，轻量级的PHP性能分析工具： 包括函数的调用次数，花费的时间（自身花费时间和包含内部函数花费的时间），所占内存/CPU，所占内存的峰值及所占百分比
具体怎么安装，使用可以去百度一下，这个真的是灰常的好用可以非常快的知道性能瓶颈在哪个文件的哪个函数，然后针对性的做优化：给个截图具体说明数据库，查看源代码，竟然有连表查询，然后查询放到了foreach中，导致了很多次小的查询。接下来就剩下针对性的优化了
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