Should I copy all my JavaScript sources into one single file?

Question

In a current web project, I\'m using several jQuery plugins and initializing them just before the closing body tag. My question is, from a loading time/performance standpoin

Answer 1

Any significant quantity of javascript code is better off in a common externalized javascript file because it can be cached more efficiently between all your pages.

A few lines of code inline in the page before the closing body tag to call some initialization code in an externalized javascript file is perfectly fine and doesn't slow anything down if that's the best way to trigger the initialization.