Wikimedia Bugzilla is closed!

First impressions count! You can make the initial experience of loading VE substantially faster by prefetching the modules on a standard article page if the DOM isn't busy.

What I have in mind is something like this:

    $( window ).load( function () {
        if ( !mw.loader.store.enabled ) {
            return;
        }

        setTimeout( function () {
            var modules = [
                'ext.visualEditor.base',
                'ext.visualEditor.core'
                'ext.visualEditor.data',
                'ext.visualEditor.icons-vector',
                'ext.visualEditor.mediawiki',
                'ext.visualEditor.viewPageTarget',
                'ext.visualEditor.viewPageTarget.icons-vector',
            ]

            mw.loader.using( modules.filter( function ( module ) {
                var key = mw.loader.store.getModuleKey( module );
                return key in mw.loader.store.items;
            } ) );

        }, 0 );
    } );


You'd need to ensure that the modules don't execute automatically somehow.