different centos version + different nginx version make different performance

hi all,Sorry to bother you again, I find pictures cannt show clearly, so copy statistics below. thanks again. I find a performace decreasing when I update centos5.4 to centos7.1 and the same time nginx-1.2.7 to nginx-1.8.0. Exacted statistics as below:Tasks: 177 total, 3 runni

different centos version + different nginx version make different performance‏

hi all, I find a performace decreasing when I update centos5.4 to centos7.1 and the same time nginx-1.2.7 to nginx-1.8.0. Exacted information as below picture: centos5.4 + nginx-1.2.7 centos7.1 + nginx-1.8.0