Glahrrgh... Sessions...

How is the session data handled when using the PHP module? Are all the
registered variables stored in memory so that when one script changes it, a
concurrent script gets the new value when accessing it?

Let's say we have a frameset of three frames, all frames perform a check to
see whether a variable is set, if not, they perform some really heavy
functions to get it set. Using the "CGI" there's a fairly good chance that
all three scripts needs to set the variable (presuming the variables are
loaded at startup, and dumped at the end of the call). Is this the same
case with the module, or is it like a working application server?