Easily find out which actions and filters are the slowest during a page load.

A benchmarking plugin to profile slow hooks.

SqlMe - MySQL monitoring and profiling tool for developers and administrators.

Lists WordPress require() calls mainly for plugin code refactoring.

This plugin will give you the total number of queries to the db per page, as well as the total time it took to render those queries out to the page.

Cross-Plugin Debug & Trace Recorder - Records and visualizes hook execution order for WordPress developers.

Monitor WordPress performance, debug slow sites, track Core Web Vitals, database queries, memory usage, and cache effectiveness. Performance monitoring built specifically for WordPress.