nginx is using the openssl library, I found that using the command "openssl speed-evp
aes-128-cbc" and "openssl speed aes-128-cbc" (no-evp time) having the big
difference.
When using the option -evp, the results is: aes-128-cbc 364994.26k
460862.91k 468244.63k 476055.20k 482093.70k
Without the option, the results is : aes-128 cbc 80423.49k
96946.13k 98267.99k 190167.04k 213497.17k