I have an app which really does nothing except print out 
java.lang.Runtime.XXXMemory() and System.getProperties() information (using 
a servlet). This app does not have any jars in WEB-INF/lib. 

The Loading Request time varies greatly. Sometimes, it's 1 second. Sometimes 
it's 1.5 seconds. Sometimes, it's 5 seconds. And sometimes, it's 20 seconds.

Can someone from Google please explain:
- what sequence of events that happens during a loading request, and what 
could cause the loading time to vary so wildly.
- what happens during precompilation. The docs says that it does some 
classloading work ahead of time. Is this the Class Data Sharing, and does it 
memory-map just the standard java libs, or does it include jetty and GAE 
jars and custom application code? 

References:
Older Thread on precompilation: 
https://groups.google.com/forum/#!topic/google-appengine-java/6vPLWqcb7ms

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