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Date: Fri, 17 Oct 2008 12:31:44 -0700 (PDT)
From: "Assaf Arkin (JIRA)" <jira@apache.org>
To: buildr-commits@incubator.apache.org
Subject: [jira] Resolved: (BUILDR-155) Lazily load code and 3rd party
 libraries to improve startup time
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     [ https://issues.apache.org/jira/browse/BUILDR-155?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Assaf Arkin resolved BUILDR-155.
--------------------------------

    Resolution: Fixed

Autoload changes merged into trunk/head.

> Lazily load code and 3rd party libraries to improve startup time
> ----------------------------------------------------------------
>
>                 Key: BUILDR-155
>                 URL: https://issues.apache.org/jira/browse/BUILDR-155
>             Project: Buildr
>          Issue Type: Improvement
>            Reporter: Assaf Arkin
>            Assignee: Assaf Arkin
>             Fix For: 1.3.4
>
>         Attachments: buildfile
>
>
> Startup time is most noticeable on JRuby, but speedup could also help for Ruby.  We can improve startup time by reducing the amount of code and 3rd party libraries we require by default, some of which are seldom used (e.g. SFTP  is used during deployment, a not-so-common task).
> This issue is an attempt at "cheap" ways to improve startup time going into the next release.  Cheap: easy to implement, easy to explain, don't render the code hard to maintain.  Since we'll carry anything we learn here into future releases, we can close this issue on the first release that employs these principles.
> The goal is to have a noticeable (> 1 sec) and significant (> 20%) improvement in startup time.  The first cut measures close to 1 sec/9% improvement (OS X 10.5.5, JRuby 1.1.3, Java 1.5.0, Core Duo 1.8Ghz):
> (trunk) $ time jruby -S _buildr -f empty 
> real    0m7.625s
> user    0m6.730s
> sys     0m0.627s
> (improved) $ time jruby -S _buildr -f empty
> real    0m6.737s
> user    0m5.940s
> sys     0m0.546s
> This was done by using autoload for some libraries. Code available here:
> http://github.com/assaf/buildr/tree/BUILDR-155
> git co git://github.com/assaf/buildr.git BUILDR-155

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