Node.js v0.9.2 upgraded openssl to upgrade 1.0.1c.
http://blog.nodejs.org/2012/09/17/node-v0-9-2-unstable/
According to
https://www.axivo.com/community/threads/upgrade-to-openssl-1-0-1-in-centos.180/
OpenSSL 1.0.1 drastically improve the performance.
So we should upgrade OpenSSL, too!