Title: Render blocking resources
Last modified: August 30, 2023

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# Render blocking resources

 *  Resolved [AnnasGourmetGoodies](https://wordpress.org/support/users/annasgourmetgoodies/)
 * (@annasgourmetgoodies)
 * [2 years, 9 months ago](https://wordpress.org/support/topic/render-blocking-resources-8/)
 * I ran GTMetrix on a WooCommerce site I am building. It was an A but has dropped
   to a C. One of the areas it says I need to work on is ‘Render Blocking Resources’.
   They recommend another caching plugin. Can you give me some ideas on settings
   to look at to improve this? The biggest offenders are .css files.

Viewing 2 replies - 1 through 2 (of 2 total)

 *  Thread Starter [AnnasGourmetGoodies](https://wordpress.org/support/users/annasgourmetgoodies/)
 * (@annasgourmetgoodies)
 * [2 years, 9 months ago](https://wordpress.org/support/topic/render-blocking-resources-8/#post-17011282)
 * Also – I tested using the WebP option on a couple of products. I notice when 
   I go to the page with their image (using Chrome), right click on the image and
   open in a new tab, it is the .JPG image. Is there any way to verify that the 
   site is serving up WebP images? Is there any downside to selecting WebP – will
   it still compress the .JPG the same and serve it up if it does not serve up WebP?
 *  Plugin Support [vupdraft](https://wordpress.org/support/users/vupdraft/)
 * (@vupdraft)
 * [2 years, 9 months ago](https://wordpress.org/support/topic/render-blocking-resources-8/#post-17013201)
 * Hi.
 * Your images are not being served as Web. From your source code, it looks like
   you are using big commerce as a CDN. Unfortunately, they do not support WebP 
   at the moment (their reason being that it is not fully supported by all browsers)
 * You are getting warnings about
 * Passive listeners: to address this, please see this thread: [https://wordpress.org/support/topic/does-not-use-passive-listeners-to-improve-scrolling-performance-wordpress/](https://wordpress.org/support/topic/does-not-use-passive-listeners-to-improve-scrolling-performance-wordpress/)
 * Properly sizing images: Unfortunately, WPO does not have the functionality to
   do this but you can use the plugin imagify to do this
 * For the unused JS: you can use a plugin such as this: Asset CleanUp 

Viewing 2 replies - 1 through 2 (of 2 total)

The topic ‘Render blocking resources’ is closed to new replies.

 * ![](https://ps.w.org/wp-optimize/assets/icon-256x256.png?rev=1552899)
 * [WP-Optimize – Cache, Compress images, Minify & Clean database to boost page speed & performance](https://wordpress.org/plugins/wp-optimize/)
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## Tags

 * [render-blocking](https://wordpress.org/support/topic-tag/render-blocking/)
 * [site speed](https://wordpress.org/support/topic-tag/site-speed/)

 * 2 replies
 * 2 participants
 * Last reply from: [vupdraft](https://wordpress.org/support/users/vupdraft/)
 * Last activity: [2 years, 9 months ago](https://wordpress.org/support/topic/render-blocking-resources-8/#post-17013201)
 * Status: resolved