Updated: November 2019
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We don’t recommend using Google’s PageSpeed Insight tools for doing mobile website benchmarking – or even for desktop. We avoid this tool. We refer you to the following articles as to why:
Why the .@Google Mobile Test Tool Is Absolute Crap >
Why you Shouldn’t Care About Google PageSpeed Insights >
Why Trying to Get 95+ on Google PageSpeed Insights for Your WordPress Site Will Drive You Mad! >
The Truth about Google Pagespeed Insights >
Google’s Bogus Error Message for Mobile Anxiety
ender-blocking JS is the most annoying and unresolvable error message Google’s mobile test delivers. It pushes some perfectionists to the brink of frothing madness. We’ve decided it must be ignored completely if you use WordPress. Give yourself a break. It’s not you that’s bad. It’s Google.
“Everybody is talking about Render Blocking. Sounds like something Google planted so we’d spend more time learning code – instead of thinking of how to run a successful blog.”
When you’re using WordPress for website production, it’s an impossible situation. The most basic components of WordPress trigger the “render-blocking JS” error message. No other method of speed testing uses render-blocking JS as a parameter. It’s not worth reporting.
Many supposed solutions are created by plugin authors attempting to resolve this frustrating error message. We tested all of the 8 plugins below. They don’t all work as claimed. They are not “plug-and-play.” They don’t eliminate the “render-blocking” error message on PageSpeed Insights. Nor do they improve page load time in the least. Three plugins broke the page being tested. Those three are marked with a red asterisk.
These are not simple or easy plugins. In most cases, they are dangerous in the wrong, inexperienced hands. You can easily damage your site. We recommend you not use them. They are esoteric fluff. Their claims are presented below but don’t believe them without testing for confirmation on your site. We had no success. This is a warning.
This is one we actually used on a web project with success:
Active installs: 80,000+
Zip file size: 202k
OTHERS WE LIST BUT DON’T RECOMMEND:
above the fold optimization 103.4k
external files optimizer* 4.7k
Description: Automatically combine and compress css/js files generate with wp_head() and wp_footer()
head cleaner* 262k
headjs loader* 15k
wp asset clean up 34k
Description: Make your website load FASTER by preventing specific scripts (.JS) & styles (.CSS) from loading on pages/posts and home page. WP Asset Clean Up scans your page and detects all the assets that are loaded. When editing a page/post select the ones you DO NOT wish to load.