I was curious if I install node.js on my machine. My concern was what if that makes slower performance or any unexpected side effects. As a result, it seems not making any problem as long as you just installed it on your machine.
You can download the installer at http://nodejs.com
It seems like the website automatically recommend the most appropriate one by the operating system. Because my machine is windows, it recommends me to install x86 version of node.js.