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https://issues.apache.org/jira/browse/DERBY-5478?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Knut Anders Hatlen updated DERBY-5478:
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Attachment: d5478.diff
The attached patch factors out the chmod call so that it's only done once, and
it also adds a little bit of logic to prevent that the scripts are rebuilt when
they're already up to date.
> Speed up creation of bin scripts
> --------------------------------
>
> Key: DERBY-5478
> URL: https://issues.apache.org/jira/browse/DERBY-5478
> Project: Derby
> Issue Type: Improvement
> Components: Build tools
> Affects Versions: 10.9.0.0
> Reporter: Knut Anders Hatlen
> Assignee: Knut Anders Hatlen
> Priority: Minor
> Attachments: d5478.diff
>
>
> The binscripts build target takes around 3 seconds in the environments I use
> for building Derby. It looks like most of the time is spent running the chmod
> Ant task on the generated scripts. There are six invocations of the chmod
> task, one for each script. The chmod task can operate on multiple files, so
> one invocation should be enough (and one invocation on six files seems to
> have about the same cost as one invocation on a single file).
> A related problem is that the scripts are always regenerated in incremental
> builds, even when there's nothing to do, so the binscripts target accounts
> for a significant part of the time it takes to run an incremental build.
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