Title: [Plugin: WordPress SEO by Yoast] zlib compression code problem
Last modified: August 20, 2016

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# [Plugin: WordPress SEO by Yoast] zlib compression code problem

 *  [Nicola](https://wordpress.org/support/users/nicoleuk/)
 * (@nicoleuk)
 * [14 years ago](https://wordpress.org/support/topic/plugin-wordpress-seo-by-yoast-zlib-compression-code-problem/)
 * I added this code to my themes header.php file
 *     ```
       <?php
       ini_set('zlib.output_compression', 'On');
       ini_set('zlib.output_compression_level', '1');
       ?>
       ```
   
 * Now WordPress SEO is causing my site to double everything
 * [http://stylereaction.com/](http://stylereaction.com/)
 * Can anyone help with this? My site was running really slow and that code has 
   helped speed.
 * [http://wordpress.org/extend/plugins/wordpress-seo/](http://wordpress.org/extend/plugins/wordpress-seo/)

The topic ‘[Plugin: WordPress SEO by Yoast] zlib compression code problem’ is closed
to new replies.

 * ![](https://ps.w.org/wordpress-seo/assets/icon-256x256.gif?rev=3419908)
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 * 0 replies
 * 1 participant
 * Last reply from: [Nicola](https://wordpress.org/support/users/nicoleuk/)
 * Last activity: [14 years ago](https://wordpress.org/support/topic/plugin-wordpress-seo-by-yoast-zlib-compression-code-problem/)
 * Status: not resolved