Upgrade to Vertex Framework 4.2.2 degrades Google PageSpeed Insights results

mikefossati

I am using the Design Control template for Joomla. After upgrading to the latest version of the Vertex Framework (4.2.2) and the template, Google PageSpeed Insights (PSI) shows a degraded value for the mobile optimization caused by an increased amount of render-blocking round trips needed to load the page.

What I noted is that the following 4 CSS files are loaded twice in the header section, with the prior version of the Vertext Framework (4.2.0) they were only loaded once:
/css/font-awesome/css/font-awesome.min.css
/css/core/s5_responsive_bars-min.css
/css/core/s5_responsive_hide_classes-min.css
/css/s5_responsive.css

I wonder if this is the cause or if there is another issue with the framework/template causing the increased amount of render-blocking round trips.

Thanks a lot for your help in getting this resolved (please note that I reverted to the prior version of the framework and template on my site, however I can replicate this behavior on my local test installation).

Mike

saguaros

Hi Mike,

I tried to update the latest version for site in my localhost but can't see these files are loaded twice.

Did you try to use a 3rd party extension for Optimize site like JCH Optimize, etc...?

mikefossati

Thanks for getting back. No, I did not try to use 3rd party extensions, and I have no plans to use such extensions.

It seems the changes introduced to "\vertex\compression\top_css_and_js_compression.php" cause the changed behavior of my website (when I revert to version 4.2.0 of the file everything is fine again). I'm currently trying to identify if there is another extension or configuration setting causing the issue, but no luck so far.

teitbite

mikefossati Hi. Can You please attach both versions of this file \vertex\compression\top_css_and_js_compression.php? I'll compare it and see what changed. If there is a mistake in between them then I'll report that to developers.

saguaros

Hi Mike,

May I know on which pages I can see these files loaded twice?

I tried to view source from homepage but they load only once.

mikefossati

@saguaros, I have reverted to the template that uses the older framework 4.2.0 which loads the files only once.

@teitbite, I have attached the two files as requested. Also included in the archive is the page source of the homepage which shows the differences between 4.2.0 and 4.2.2.

Many thanks to both of you for your support.

files.zip

38kB