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From Stefan Bodewig <>
Subject Re: Sometime making jar takes long time
Date Tue, 01 Jun 2010 15:04:25 GMT

this really is a question for the user list, not the dev list.

On 2010-06-01, SHAILJA wrote:

> I have simple build.xml file to make jar only

> <project name="common.primitive" default="jar" basedir=".">
> <target name="jar">
> <jar destfile="/u/kumari/main/base/java/jar/common.jar"
>      basedir="/u/kumari/main/base/java/classes"
>      includes="common/**"/>
> </target>
> </project>

basedir="/u/kumari/main/base/java/classes/common" and no includes may be
a tiny bit faster.  Not much, though.

> I used "ant-1.7.1/bin/ant jar"

Ant 1.7.1 is known to be a lot slower that Ant 1.8.x when it scans big
directory trees.

> I suspect Ant contributes to the problem by searching the file system for
> items to add to the jar.

It sure does.

> If this is the case, then we might be able to configure Ant to reduce
> this file system activity.

I wouldn't know how, since it has to scan the filesystems once anyway.
Like I said there have been performance improvements in 1.8.0 but they
only apply if your directory tree contains many files.


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