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https://issues.apache.org/jira/browse/CAUSEWAY-3857?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Andi Huber updated CAUSEWAY-3857:
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Issue Type: Improvement (was: Bug)
> [Performance] Wicket Viewer Table Rendering triggers a lot of XHR for Prism
> Resources
> -------------------------------------------------------------------------------------
>
> Key: CAUSEWAY-3857
> URL: https://issues.apache.org/jira/browse/CAUSEWAY-3857
> Project: Causeway
> Issue Type: Improvement
> Components: Viewer Wicket
> Reporter: Andi Huber
> Assignee: Andi Huber
> Priority: Major
> Labels: end-user-visible
> Fix For: 3.3.0
>
>
> When rendering tables with around 1k rows, a problem starts to become
> apparent, that is, the browser is getting very busy to repeatedly request
> Prism resources (CSS and JS) from the server.
> Those requests are hitting the browser cache, however when the number of
> requests becomes large, page loading times go through the roof.
> +Example Request:+
> ...de.agilecoders.wicket.webjars.request.resource.WebjarsJavaScriptResourceReference/webjars/prism/components/prism-java.min-ver-5604F7C290AE9E1F2BBCB4F77D769FD2.js
> +Potential Solution:+
> I recall that Prism's JS needs to run on every single DOM element, that
> requires syntax highlighting. However, this does not mean, that we need to
> load the underlying resources more than once per page render. Hope is, that
> we can trigger the Prism JS code to be executed client side on all DOM
> elements that require it, while only requesting the resources once per page
> rendering.
> +Actual Solution:+
> We ended up doing the syntax highlighting now server-side using the GraalJs
> Engine. The Engine requires ~3s to get instantiated (once per application
> launch). Each DOM element of type '<code>' will then be processed taking
> around 100ms. This is not great from a performance perspective, but I'm happy
> with the approach, as AsciiDoc and Markdown source to HTML conversion is also
> done server-side. And it allowed for removal of quirky code in the Wicket
> Viewer.
>
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