Is Static method use in large project like Social networking site is good approach

thanks
Sam Hobbs

but  i want  to know Is Static method  Slow  or  Fast

static  Method  can  be  slow  the  application ?

Static methods are not good for using/saving user defined informations. Every time when the object get called the data get overwritten.
Means, single form of data across application. If want to share common data across all the session users then you can.