Query Monitor wordpress plugin resources analysis

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Name	Query Monitor
Version	2.7.0
Author	John Blackbourn
Rating	100
Last updated	2015-03-09 01:36:00
Downloads	44018
Download Plugins Speed Test plugin for Wordpress

Home page

Delta: 0%

Post page

Delta: 0%

Query Monitor plugin has no negative impact on PageSpeed score.

Home page PageSpeed score has been degraded by 0%, while Post page PageSpeed score has been degraded by 0%

Query Monitor plugin added 114 bytes of resources to the Home page and 101 bytes of resources to the sample Post page.

Query Monitor plugin added 0 new host(s) to the Home page and 0 new host(s) to the sample Post page.

Great! Query Monitor plugin ads no tables to your Wordpress blog database.

Resources Added (Post page)

Description

Query Monitor is a debugging plugin for anyone developing with WordPress. It has some advanced features not available in other debugging plugins, including automatic AJAX debugging and the ability to narrow down things by plugin or theme.

For complete information, please see Query Monitor's GitHub repo.

Here's an overview of what's shown:

Database Queries

Shows all database queries performed on the current page
Shows affected rows and time for all queries
Show notifications for slow queries and queries with errors
Filter queries by query type (SELECT, UPDATE, DELETE, etc)
Filter queries by component (WordPress core, Plugin X, Plugin Y, theme)
Filter queries by calling function
View aggregate query information grouped by component, calling function, and type
Super advanced: Supports multiple instances of wpdb on one page

Filtering queries by component or calling function makes it easy to see which plugins, themes, or functions on your site are making the most (or the slowest) database queries.

Hooks

Shows all hooks fired on the current page, along with hooked actions, their priorities, and their components
Filter hooks by part of their name
Filter actions by component (WordPress core, Plugin X, Plugin Y, theme)

Theme

Shows the template filename for the current page
Shows the available body classes for the current page
Shows the active parent and child theme name

PHP Errors

PHP errors (warnings, notices, stricts, and deprecated) are presented nicely along with their component and call stack
Shows an easily visible warning in the admin toolbar

Request

Shows matched rewrite rules and associated query strings
Shows query vars for the current request, and highlights custom query vars
Shows the queried object details (collapsed by default)
Shows details of the current blog (multisite only) and current site (multi-network only)

Scripts & Styles

Shows all enqueued scripts and styles on the current page, along with their URL and version
Shows their dependencies and dependents, and alerts you to any broken dependencies

HTTP Requests

Shows all HTTP requests performed on the current page (as long as they use WordPress' HTTP API)
Shows the response code, call stack, transport, timeout, and time taken
Highlights erroneous responses, such as failed requests and anything without a 200 response code

Redirects

Whenever a redirect occurs, Query Monitor adds an X-QM-Redirect HTTP header containing the call stack, so you can use your favourite HTTP inspector to easily trace where a redirect has come from

AJAX

The response from any jQuery AJAX request on the page will contain various debugging information in its header that gets output to the developer console. No hooking required.

AJAX debugging is in its early stages. Currently it only includes PHP errors, but this will be built upon in future versions.

Admin Screen

Hands up who can remember the correct names for the filters and actions for custom admin screen columns?

Shows the correct names for custom column filters and actions on all admin screens that have a listing table
Shows the state of get_current_screen() and a few variables

Environment Information

Shows various PHP information such as memory limit and error reporting levels
Highlights the fact when any of these are overridden at runtime
Shows various MySQL information, including caching and performance related configuration
Highlights the fact when any performance related configurations are not optimal
Shows various details about WordPress and the web server
Shows version numbers for all the things

Everything Else

Shows any transients that were set, along with their timeout, component, and call stack
Shows all WordPress conditionals on the current page, highlighted nicely
Shows an overview including page generation time and memory limit as absolute values and as % of their respective limits
Shows all scripts and styles which were enqueued on the current page, along with their URL, dependencies, dependents, and version number

Authentication

By default, Query Monitor's output is only shown to Administrators on single-site installs, and Super Admins on Multisite installs.

In addition to this, you can set an authentication cookie which allows you to view Query Monitor output when you're not logged in (or if you're logged in as a non-administrator). See the bottom of Query Monitor's output for details.