[Bug 43144] tar task is very slow when a is used as the source resource

[bu...@apache.org]

https://bz.apache.org/bugzilla/show_bug.cgi?id=43144

--- Comment #12 from KC Wong <kc...@gmail.com> ---
I encountered the same problem today.

Trying to pack the following into a JAR using <archive> took 5 minutes: 
<path id="runtime_classpath">
  <pathelement path="${javax:javaee-api:jar}"/>
  <pathelement path="${com.solacesystems:sol-jms:jar}"/>
  <pathelement path="${com.fasterxml.jackson.core:jackson-databind:jar}"/>
  <pathelement path="${com.fasterxml.jackson.core:jackson-core:jar}"/>
  <pathelement path="${com.fasterxml.jackson.core:jackson-annotations:jar}"/>
  <pathelement path="${commons-logging:commons-logging:jar}"/>
  <pathelement path="${commons-lang:commons-lang:jar}"/>
  <pathelement path="${log4j:log4j:jar}"/>
  <pathelement path="${org.slf4j:slf4j-api:jar}"/>
  <pathelement path="${org.slf4j:slf4j-log4j12:jar}"/>
</path>
<jar destfile="${out.dir}/${env}/${project.build.finalName}.jar">
  <fileset 
       
dir="${project.build.directory}\${project.build.finalName}\WEB-INF\classes" 
        includes="**/*.class, **/*.json, **/*.properties" 
  />
  <archives>
    <zips>
        <path refid="runtime_classpath" />
    </zips>
  </archives>
  <manifest>
    <attribute name="Main-Class" value="${mainClass}"/>
  </manifest>
</jar>

I changed to use Unzip to a temp folder, and add the temp folder as a fileset
instead. That took 1 minute.

The archive tag is doing something really inefficiently...

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