Log Slow Page Loads
Writes a line to the PHP error log for every request that takes longer than a set number of seconds, with the URL, time, memory and query count.
Snippet Library
Developer snippets for WordPress
Snippets for developers: debugging helpers, custom cron schedules, body classes, REST API tweaks and admin tools for checking hooks and queries. Building blocks for people who write code for WordPress every day.
Measure How Long Code Takes
Adds wpide_timer_start() and wpide_timer_stop() helpers that measure the time and memory a piece of code uses and write the result to the PHP error log, to find slow functions.
Query Count and Load Time in the Page Source
Adds an HTML comment at the bottom of front-end and admin pages with the number of database queries, generation time and peak memory. Visible to administrators only.
Show PHP Version, Memory and Queries in the Admin Footer
Replaces the WordPress version in the bottom right of admin screens with the PHP version, peak memory use and database query count of the current page.
wp-config.php Settings Overview Under Tools
Adds a Tools > Config Constants screen that shows the value of important wp-config.php settings, such as debug mode, memory limits, cron, caching and file editing, without opening the file.