Stefan Bodewig <bode...@apache.org> wrote on 22.03.2010 14:04:54: > This could mean the "variable" task has been slowed down (since the > string gets longer with each invocation) or the loop itself has been > slowed down. Can you isolate the two possibilities by not doing > anything inside the loop? > > I'm not too familiar with the for task, but you say you are using a > "path-like structure" in one place and "fileset" in another. In case it > is a <path> it may be that Ant 1.7.1 used to cache its contents while it > no longer does so for 1.8.0 (and thus would rescan the filesystem on > each iteration) - hmm, I think it shouldn't have been cached in 1.7.1 > either <https://issues.apache.org/bugzilla/show_bug.cgi?id=41151>. > > Anyway, there is a (undocumented) cache attribute on <path>, can you set > this to true and see whether it helps? > > Stefan >
Hello Stefan, I could track the performance leak down to the Ant-Contrib "variable" task. As you wrote, it seems this task has slowed down since the string gets longer with each invocation. If I comment out the suspicious line, the Ant script runs equally fast on 1.8.0 and 1.7.1. BTW, I'm using a path based on a fileset, but the (undocumented) cache attribute on <path> didn't help. I wrote a little demonstration ant script, packed the necessary Ant-Contrib JAR beside it, and dropped the ZIP file on Sendspace: http://www.sendspace.com/file/b4zcmo. Please feel free to test it. Below is the output for 1.7.1 versus 1.8.0 on my machine. Regards, Christoph PS: Here's the output ---8<--- Snip ---8<---------------------------------------------------------------------------------------- cgroth...@isrbsnb314:/data/work/AntDebug$ export ANT_HOME=/opt/ant/1.7.1/ cgroth...@isrbsnb314:/data/work/AntDebug$ ant Buildfile: build.xml prepare: [echo] ################################################################################ [echo] This is the Ant and Ant-Contrib Performance Leak debugging script [echo] Ant Version: Apache Ant version 1.7.1 compiled on June 27 2008 [echo] ################################################################################ [mkdir] Created dir: /data/work/AntDebug/target [copy] Copying 150 files to /data/work/AntDebug/target test: [echo] Writing the content of property "testvar" to target/testoutput.xml BUILD SUCCESSFUL Total time: 0 seconds cgroth...@isrbsnb314:/data/work/AntDebug$ export ANT_HOME=/opt/ant/1.8.0/ cgroth...@isrbsnb314:/data/work/AntDebug$ ant Buildfile: /data/work/AntDebug/build.xml prepare: [echo] ################################################################################ [echo] This is the Ant and Ant-Contrib Performance Leak debugging script [echo] Ant Version: Apache Ant version 1.8.0 compiled on February 1 2010 [echo] ################################################################################ test: [echo] Writing the content of property "testvar" to target/testoutput.xml BUILD SUCCESSFUL Total time: 8 seconds cgroth...@isrbsnb314:/data/work/AntDebug$
