javascript vs. java code and 9IAS over Apache and default parame ters

[Pa...@doh.state.fl.us]

Guys,

I am being asked advice on the relative efficiencies or lack of efficiencies
between javascript, java and other web code.  Is there a simple way to tell
the difference between the different types of code by looking at file type
or file extensions or something within the file?  

Is there a way to tell how often different types of languages are used or
how from the compiled code or Apache monitor?

Finally, the system has been setup with all the default parameters for
Apache and 9IAS in the configuration files which indicates to me no tuning
at all.  Any opinions?