https://bugzilla.wikimedia.org/show_bug.cgi?id=66360
Bug ID: 66360
Summary: Mantle compiles all handlebars templates on initial
load
Product: MediaWiki extensions
Version: master
Hardware: All
OS: All
Status: NEW
Severity: enhancement
Priority: Unprioritized
Component: Mantle
Assignee: wikibugs-l@lists.wikimedia.org
Reporter: sp...@wikimedia.org
CC: jrob...@wikimedia.org, sp...@wikimedia.org
Web browser: ---
Mobile Platform: ---
AIUI, all templates in a RL module turn into
mw.mantle.template.add("name.handlebars",
"...the template's handlebars 'HTML-like' source");
add() immediately compiles the template into an object with a JavaScript
render() function to output the HTML.
It works, but it means that using a module with lots of templates results in
the browser compiling every single template, even if some are rarely invoked.
We should measure the overhead; if it's significant, maybe there's a way to
defer the compilation. It could be an explicit step (template.use()?) or defer
it until the first time render() is called.
The design should also account for pre-compilation (bug 64735), wherein RL
would optionally load handlebars templates pre-compiled to JavaScript. The JS
in code invoking mantle template functions should not have to change.
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