title: a function that is faster than printf
body: <p>I am beginner c programmer and I read that <code>printf()</code> is very sophisticates function that is very slow and consumes many CPU cycles. So I want to know is there any function that exists in standard pure c library and is faster than <code>printf()</code> or not and when to use that function and when not to use it. My goal is to write efficient code that can work on any computer and/or embedded system</p>