• Shows the toolbar menu on small screens again
• Calls any previously registered PHP error handler, and passes fatal errors on to PHP after displaying them so they're logged
• Prevents infinite recursion when a backtrace is constructed from within a hook
• Fixes a fatal error and warnings when an HTTP request is short-circuited via the pre_http_request filter
• Clarifies the warning shown for short-circuited HTTP requests
• Correctly handles closures in call stacks on PHP 8.4+
• Doesn't show Query Monitor on the login page when reauthentication is required
• Compatibility with script concatenation and asset URL changes in WordPress 7.2
• Fixes panels failing to render when the data contains invalid UTF-8

• Confirms support for WordPress 7.1 (better late than never)
• Shows the file size of enqueued scripts and styles
• Improves the styling of the admin toolbar menu and the nav menu
• Explains why database queries were performed but none were logged
• Deletes the db.php drop-in when Query Monitor is deactivated with WP-CLI
• Avoids warnings when a preempted HTTP response is missing its code or message

• Confirms support for WordPress 7.0
• Makes improvements to the admin bar menu
• Shows database queries on the timeline even when db.php isn't in place
• Adds more error highlighting for problems with enqueued JavaScript and CSS dependencies
• Adds some back-compat for old versions of the Chrome browser

Version 4 of Query Monitor adds a new timeline view, and switches from rendering its panels server-side in PHP to efficiently rendering them client-side in Preact.

Version 4.0.6 fixes a compatibility issue with the GeneratePress theme.

More information at querymonitor.com/4.

Version 4 of Query Monitor adds a new timeline view, and switches from rendering its panels server-side in PHP to efficiently rendering them client-side in Preact.

Version 4.0.5 fixes the following:

• Ensures closing script tags within data don't break the output
• Adds "Doing it Wrong" data to the timeline view

More information at querymonitor.com/4.

Version 4 of Query Monitor adds a new timeline view, and switches from rendering its panels server-side in PHP to efficiently rendering them client-side in Preact.

Version 4.0.4 fixes the following:

• Ensures the Scripts panel remains visible when no scripts are enqueued in the header
• Corrects the display of number formatting in some locales

More information at querymonitor.com/4.

Version 4 of Query Monitor adds a new timeline view, and switches from rendering its panels server-side in PHP to efficiently rendering them client-side in Preact.

Version 4.0.3 fixes the following:

• Improves compatibility with plugins that perform non-UTF8 queries or make other use of non-UTF8 data
• Avoids a PHP warning for undefined file and line number in some stack trace frames
• Simplifies and standardises the format of names used for closure callbacks
• Improves styling and layout of the timeline view

More information at querymonitor.com/4.

Version 4 of Query Monitor adds a new timeline view, and switches from rendering its panels server-side in PHP to efficiently rendering them client-side in Preact.

Version 4.0.2 fixes the following:

• Adds further backwards compatibility for third-party plugins that read from the QM data collectors and output their own panels
• Adds transient updates to the timeline view

More information at querymonitor.com/4.

Version 4 of Query Monitor adds a new timeline view, and switches from rendering its panels server-side in PHP to efficiently rendering them client-side in Preact.

• Version 4.0.1 fixes a backwards compatibility issue with plugins that register their own menus or sub-menus in Query Monitor.

More information at querymonitor.com/4.

Version 4 of Query Monitor adds a new timeline view, and switches from rendering its panels server-side in PHP to efficiently rendering them client-side in Preact. This new approach provides several benefits:

• Performance is greatly increased, particularly on sites where a large number of queries are performed, a large number of PHP errors are triggered, or a large amount of data is collected in one of the other panels.
• Further future enhancements are facilitated, such as displaying client-side metrics, lazy-loading data, showing data from different requests, and more remixing of data into different views.
• The raw data collected by Query Monitor has been reduced in size and memory usage, and is now exposed to the page as JSON. Take a look at the QueryMonitorData object in your browser console to play around with it.

More information at querymonitor.com/4.