[jira] [Reopened] (VCL-505) Dojo is slow to load, especially on pages with many ancillary class files

["Josh Thompson (Reopened) (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/VCL-505?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Josh Thompson reopened VCL-505:
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> Dojo is slow to load, especially on pages with many ancillary class files
> -------------------------------------------------------------------------
>
>                 Key: VCL-505
>                 URL: https://issues.apache.org/jira/browse/VCL-505
>             Project: VCL
>          Issue Type: Improvement
>          Components: web gui (frontend)
>            Reporter: Aaron Coburn
>            Assignee: Josh Thompson
>            Priority: Minor
>             Fix For: 2.3
>
>         Attachments: utils.php.patch, vcl.profile.js, vcl.profile.js
>
>
> Dojo has a dynamic loading mechanism with the dojo.require("...") function. This is very convenient for developers, but for web users, this requires, in some cases, dozens of extra GET requests to load the ancillary javascript libraries.
> With this in mind, I would recommend looking at the Dojo custom build framework at:
> http://dojotoolkit.org/reference-guide/quickstart/custom-builds.html
> This allows a developer to create custom javascript libraries that contain all the needed code for a given 'profile'. I have done this for our installation of the VCL, and it results in a dramatic improvement in load times for individual pages.
> This change requires changing the .ht-inc/utils.php file. I have attached a sample patch (based on version 2.2.1).
> This also requires building a custom dojo environment which can be done by first downloading the full dojo SDK, and then creating a vcl 'profile' in dojo-release-x.x.x-src/util/buildscripts/profile (i.e. vcl.profile.js). The custom files can be generated by issuing the following commands:
> $ cd dojo-release-x.x.x-src/util/buildscripts
> $ ./build.sh profile=vcl action=release
> (I first added the vcldojo files to the dojo directory so that the TimeTextBoxEnd class could be included in the package).
> I have also attached the vcl profile I used. The names given to each 'layer' correspond to the changes in utils.php.

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