https://issues.apache.org/bugzilla/show_bug.cgi?id=49384
Summary: Fix for Bug 48746 causes slowdown in chmod task execution Product: Ant Version: 1.8.1 Platform: PC OS/Version: Linux Status: NEW Severity: normal Priority: P2 Component: Core tasks AssignedTo: notifications@ant.apache.org ReportedBy: do...@moonteeth.com The fix for bug 48746 causes slowdown in task execution significantly. On my system with the "time" command it appears to add around 400ms of latency for each process exec. I've only tested it on chmod, because one of our projects has need to chmod massive files. I have a simple build.xml: <project name="chmodtest" default="doChmodSingle" basedir="."> <target name="doChmodSingle"> <chmod dir="." type="file" perm="755" includes="**" parallel="false"/> </target> <target name="doChmodParallel"> <chmod dir="." type="file" perm="755" includes="**" parallel="true"/> </target> </project> run against 100 files created with: for i in `seq 1 100`; do touch $i; done With the 1.8.1 stock PumpStreamHandler: Buildfile: /mnt/disk1/home/awang/test/build.xml doChmodSingle: BUILD SUCCESSFUL Total time: 41 seconds real 0m41.483s user 0m0.738s sys 0m0.614s With the Os.isFamily("windows") back in the StreamPumper constructor (this was removed and replaced with true for the fix for bug 48746) the results are: Buildfile: /mnt/disk1/home/awang/test/build.xml doChmodSingle: BUILD SUCCESSFUL Total time: 0 seconds real 0m1.079s user 0m0.704s sys 0m0.601s With the doChmodParallel, the results are consistently: stock 1.8.1 behavior real 0m0.874s (this varies from 872-875 on about a dozen runs) Os.isFamily("windows") check behavior: real 0m0.474s (this is pretty consistent) Because of AIX's annoying handling of parallelism, for certain large directories, we just gave up and turned off parallelism. Even with a realistic maxparallel, the extra 400ms per execution can add as minutes to the build script time. -- Configure bugmail: https://issues.apache.org/bugzilla/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are the assignee for the bug.