Title: [Plugin: WP Super Cache] Created output buffer / Output buffer callback – Lag?
Last modified: August 20, 2016

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# [Plugin: WP Super Cache] Created output buffer / Output buffer callback – Lag?

 *  [warpdag](https://wordpress.org/support/users/warpdag/)
 * (@warpdag)
 * [14 years, 5 months ago](https://wordpress.org/support/topic/plugin-wp-super-cache-created-output-buffer-output-buffer-callback-lag/)
 * Hi – WP Super Cache works fine and does a great job at caching my files, so thanks
   for that. However the plugin seems to take ages to create actual cached versions
   of my posts the first time they are called. Looks like there’s a large lag time
   between the ‘Created output buffer’ and ‘Output buffer callback’ steps, and I
   can’t explain why. Could you explain what is the plugin doing between these steps?
   Will try to parse the php and see what’s going on, but pointers would help. Also
   note that when WP Super Cache is disabled, WP takes about 1 to 2 seconds to generate
   the same page, while super cache takes at least 6 seconds to generate its copy
   the first time the page is called.
 * Thanks.
 * David
 * Debug output below (called a random page to illustrate the issue)
 * <!– Dynamic page generated in 5.908 seconds. –>
    <!– Cached page generated by
   WP-Super-Cache on 2011-12-16 13:32:55 –> <!– Compression = gzip –>
 * 19:32:49 /page/45/ supercache dir: /home/mydir/public_html/wp-content/cache/supercache/
   www.mysite.com/page/45/
    19:32:49 /page/45/ No wp-cache file exists. Must generate
   a new one. 19:32:49 /page/45/ In WP Cache Phase 2 19:32:49 /page/45/ Setting 
   up WordPress actions 19:32:49 /page/45/ Created output buffer 19:32:55 /page/
   45/ Output buffer callback 19:32:55 /page/45/ Anonymous user detected. Only creating
   Supercache file. 19:32:55 /page/45/ Gzipping buffer. 19:32:55 /page/45/ Writing
   non-gzipped buffer to supercache file. 19:32:55 /page/45/ Writing gzipped buffer
   to supercache file. 19:32:55 /page/45/ Renamed temp supercache file to /home/
   mydir/public_html/wp-content/cache/supercache/www.mysite.com/page/45/index.html
   19:32:55 /page/45/ Renamed temp supercache gz file to /home/mydir/public_html/
   wp-content/cache/supercache/www.mysite.com/page/45/index.html.gz 19:32:55 /page/
   45/ Writing gzip content headers. Sending buffer to browser 19:32:55 /page/45/
   wp_cache_shutdown_callback: collecting meta data.
 * [http://wordpress.org/extend/plugins/wp-super-cache/](http://wordpress.org/extend/plugins/wp-super-cache/)

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

 *  [leendertvb](https://wordpress.org/support/users/leendertvb/)
 * (@leendertvb)
 * [13 years, 6 months ago](https://wordpress.org/support/topic/plugin-wp-super-cache-created-output-buffer-output-buffer-callback-lag/#post-2455974)
 * Hi,
 * I know this is an old post, but did you manage to get a solution? I’m having 
   exactly the same problem, but my site is lagging for about 20 seconds.
 * Thanks for your answer!
 *  [leendertvb](https://wordpress.org/support/users/leendertvb/)
 * (@leendertvb)
 * [13 years, 6 months ago](https://wordpress.org/support/topic/plugin-wp-super-cache-created-output-buffer-output-buffer-callback-lag/#post-2455975)
 * Sorry, already found the solution.
 * When reading [this post](http://wordpress.org/support/topic/super-cache-for-logged-in-users-really-slow?replies=7#post-2108289)
   I realized I had a widget checking the status of my Skype account to show the
   actual state on the website. After disabling this widget, the caching worked 
   like a charm again.
 * So check for any external resources used in your PHP which can slow down the 
   process. Hope this helps someone in the future having the same problem.

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

The topic ‘[Plugin: WP Super Cache] Created output buffer / Output buffer callback–
Lag?’ is closed to new replies.

 * ![](https://ps.w.org/wp-super-cache/assets/icon-256x256.png?rev=3506220)
 * [WP Super Cache](https://wordpress.org/plugins/wp-super-cache/)
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 * 2 replies
 * 2 participants
 * Last reply from: [leendertvb](https://wordpress.org/support/users/leendertvb/)
 * Last activity: [13 years, 6 months ago](https://wordpress.org/support/topic/plugin-wp-super-cache-created-output-buffer-output-buffer-callback-lag/#post-2455975)
 * Status: not resolved