I noticed that it took a very long time to to enter a foreach loop with a
fileset for one of my scripts so I took a look at the code that was
interacting with the System.IO namespace. I suspected that use of
DirectoryInfo and FileInfo object was causing the issue. Using the GetFiles
and GetDirectories methods on the DirectoryInfo class is a performance
problem. Either calling out to win32 libs or the static methods on
Directory are a better way to go. In the Class DirectoryScanner's method
ScanDirectory was were all the interaction with DirectoryInfo was happening.
I created a test script:
<target name="test">
<property name="ProductDirectory"
value="C:\Projects\dod.ahlta\Current\Product"/>
<fileset id="ProjectFiles">
<include name="${ProductDirectory}\**\*.*proj"/>
</fileset>
<echo message="dod.ahlta has ${fileset::file-count('ProjectFiles')}
projects."/>
</target>
Before I switched all calls to the static Directory class the time to
complete this script was *16+ seconds*. After the switch it completed in
*3+ seconds*.
--
Jay Flowers
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http://jayflowers.com
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