Title: Code timings crash website
Last modified: February 12, 2024

---

# Code timings crash website

 *  Resolved [Altaico](https://wordpress.org/support/users/altaico/)
 * (@altaico)
 * [2 years, 3 months ago](https://wordpress.org/support/topic/code-timings-crash-website/)
 * Hi,
 * thank you for this awesome plugin. But, I have a problem the I put this code 
   in the functions.php to follow the “timings” in my web.
 * // Start the ‘foo’ timer:
   do_action( ‘qm/start’, ‘foo’ );
 * // Run some code
   my_potentially_slow_function();
 * // Stop the ‘foo’ timer:
   do_action( ‘qm/stop’, ‘foo’ );
 * The web just crash.
 * Is it correct the code? In this way I can’t check the performance of my web.
 * Thank you
 * Regards
 * The page I need help with: _[[log in](https://login.wordpress.org/?redirect_to=https%3A%2F%2Fwordpress.org%2Fsupport%2Ftopic%2Fcode-timings-crash-website%2F%3Foutput_format%3Dmd&locale=en_US)
   to see the link]_

Viewing 4 replies - 1 through 4 (of 4 total)

 *  Plugin Author [John Blackbourn](https://wordpress.org/support/users/johnbillion/)
 * (@johnbillion)
 * WordPress Core Developer
 * [2 years, 3 months ago](https://wordpress.org/support/topic/code-timings-crash-website/#post-17417744)
 * Yes that’s correct. Are you able to check your PHP error log to see what the 
   error is?
 *  Thread Starter [Altaico](https://wordpress.org/support/users/altaico/)
 * (@altaico)
 * [2 years, 3 months ago](https://wordpress.org/support/topic/code-timings-crash-website/#post-17418191)
 * Also, the plugin crash when I modify the products in woocommerce.
 * This is the error when I modify the products in woocommerce:
 * **Fatal error**: Uncaught Error: parse_url() expects parameter 1 to be string,
   null given
   in **/home/customer/www/altaico.es/public_html/wp-content/plugins/
   query-monitor/collectors/http.php** on line **374**
 * Call stack:
    1.  `parse_url()`
        wp-content/plugins/query-monitor/collectors/http.php:374
    2.  `QM_Collector_HTTP::process()`
        wp-content/plugins/query-monitor/classes/Collectors.
        php:84
    3.  `QM_Collectors::process()`
        wp-content/plugins/query-monitor/classes/Dispatcher.
        php:108
    4.  `QM_Dispatcher::get_outputters()`
        wp-content/plugins/query-monitor/dispatchers/
        Redirect.php:39
    5.  `QM_Dispatcher_Redirect::filter_wp_redirect()`
        wp-includes/class-wp-hook.php:
        324
    6.  `WP_Hook::apply_filters()`
        wp-includes/plugin.php:205
    7.  `apply_filters()`
        wp-includes/pluggable.php:1396
    8.  `wp_redirect()`
        wp-admin/includes/post.php:2205
    9.  `redirect_post()`
        wp-admin/post.php:234
 * Query Monitor
 * And this is the error when I add the code for timings:
 * **Fatal error**: Uncaught Error: Call to undefined function my_potentially_slow_function()
   
   in **/home/customer/www/altaico.es/public_html/wp-content/themes/generatepress-
   child/functions.php** on line **138**
 * Call stack:
    1. `include()`
       wp-settings.php:611
    2. `require_once()`
       wp-config.php:83
    3. `require_once()`
       wp-load.php:50
    4. `require_once()`
       wp-admin/admin.php:34
    5. `require_once()`
       wp-admin/index.php:10
 * Query Monitor
 *  Plugin Author [John Blackbourn](https://wordpress.org/support/users/johnbillion/)
 * (@johnbillion)
 * WordPress Core Developer
 * [2 years, 3 months ago](https://wordpress.org/support/topic/code-timings-crash-website/#post-17418313)
 * `my_potentially_slow_function` is just some example code, you should replace 
   this with the code that you’re trying to profile.
 *  Thread Starter [Altaico](https://wordpress.org/support/users/altaico/)
 * (@altaico)
 * [2 years, 3 months ago](https://wordpress.org/support/topic/code-timings-crash-website/#post-17418461)
 * Understood, I would like to check what functions slow down the website.
 * For example, the timer stars a when the page is loaded, Query Monitor records
   the page generation time and check what slow down it.
 * Can you help me?
 * Please and thank you.
    -  This reply was modified 2 years, 3 months ago by [Altaico](https://wordpress.org/support/users/altaico/).

Viewing 4 replies - 1 through 4 (of 4 total)

The topic ‘Code timings crash website’ is closed to new replies.

 * ![](https://ps.w.org/query-monitor/assets/icon.svg?rev=2994095)
 * [Query Monitor](https://wordpress.org/plugins/query-monitor/)
 * [Frequently Asked Questions](https://wordpress.org/plugins/query-monitor/#faq)
 * [Support Threads](https://wordpress.org/support/plugin/query-monitor/)
 * [Active Topics](https://wordpress.org/support/plugin/query-monitor/active/)
 * [Unresolved Topics](https://wordpress.org/support/plugin/query-monitor/unresolved/)
 * [Reviews](https://wordpress.org/support/plugin/query-monitor/reviews/)

## Tags

 * [code](https://wordpress.org/support/topic-tag/code/)

 * 4 replies
 * 2 participants
 * Last reply from: [Altaico](https://wordpress.org/support/users/altaico/)
 * Last activity: [2 years, 3 months ago](https://wordpress.org/support/topic/code-timings-crash-website/#post-17418461)
 * Status: resolved