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https://issues.apache.org/jira/browse/BUILDR-658?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13736091#comment-13736091
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Peter Donald commented on BUILDR-658:
-------------------------------------
Some more links when this is persued.
https://github.com/jruby/jruby/wiki/Improving-startup-time
https://github.com/logstash/logstash/blob/master/lib/logstash/monkeypatches-for-performance.rb
> Improve the speed of the all-in-one package
> -------------------------------------------
>
> Key: BUILDR-658
> URL: https://issues.apache.org/jira/browse/BUILDR-658
> Project: Buildr
> Issue Type: Bug
> Components: Packaging
> Affects Versions: 1.4.10
> Reporter: Peter Donald
> Assignee: Peter Donald
> Fix For: 1.4.13
>
>
> Running buildr under jruby is slow. A large portion of the blame can be
> attributed to rubygems and some can be attributed to the startup time of
> parsing the ruby files and the bytecode compilation under the JVM.
> It seems this is largely fixable by applying a few ugly hacks. These include;
> * Extracting all the ruby code into one directory. (Seems to show the biggest
> improvement)
> * Running jrubyc over the codebase and replacing all the .rb files with
> quires against the .class files such as warbler does
> In one project we applied these techniques and our startup time when from
> ~23s to ~1.5s however some projects see even better improvements. See [1] for
> a better explanation and some additional tricks to try.
> [1]
> https://logstash.jira.com/browse/LOGSTASH-563?focusedCommentId=14695&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-14695
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