One thing I noticed when looking at Tomcat 5.0.x is that its default,
static-file-delivering servlet does a stat(2) of each path prefix leading
up to the file. A standard installation of Apache 2.x, with FollowSymlinks
enabled, doesn't do these stat calls, for obvious performance reasons.
Is the stat'ing of all the directories leading up to the requested file in Tomcat intentional (it *is* valuable in some environments for security purposes), or is it just a side-effect of the implementation?
I really have no idea what this stuff means.
stat is a Unix system call which retrives the status information of a file or directory.
Each stat call can potentially hit the disk, so this can be a very expensive system call to make if you have deep directory trees and could explain some of the performance differences between Apache and Tomcat.
-Dave
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