Author: Derrick

START: 10:save_post, (Callback: `delete_get_calendar_cache`)
STOP: 10:save_post, Taken 132.084μs (Callback: `delete_get_calendar_cache`)
START: 10:save_post, (Callback: `sharing_meta_box_save`)
STOP: 10:save_post, Taken 15.974μs (Callback: `sharing_meta_box_save`)
START: 10:save_post, (Callback: `Jetpack_Likes_Settings::meta_box_save`)
STOP: 10:save_post, Taken 19.073μs (Callback: `Jetpack_Likes_Settings::meta_box_save`)
START: 10:save_post, (Callback: `SyntaxHighlighter::mark_as_encoded`)
STOP: 10:save_post, Taken 19.073μs (Callback: `SyntaxHighlighter::mark_as_encoded`)
START: 10:save_post, (Callback: `AMP_Post_Meta_Box::save_amp_status`)
STOP: 10:save_post, Taken 16.928μs (Callback: `AMP_Post_Meta_Box::save_amp_status`)
START: 20:save_post, (Callback: `Publicize::save_meta`)
STOP: 20:save_post, Taken 428.915μs (Callback: `Publicize::save_meta`)
START: 9000:save_post, (Callback: `Debug_Bar_Slow_Actions::time_stop`)
STOP: 9000:save_post, Taken 11.921μs (Callback: `Debug_Bar_Slow_Actions::time_stop`)
START: 1:save_post, (Callback: `The_SEO_Framework\Load::_update_post_meta`)
STOP: 1:save_post, Taken 6.016ms (Callback: `The_SEO_Framework\Load::_update_post_meta`)
START: 1:save_post, (Callback: `The_SEO_Framework\Load::_save_inpost_primary_term`)
STOP: 1:save_post, Taken 1.535ms (Callback: `The_SEO_Framework\Load::_save_inpost_primary_term`)
START: 10:save_post, (Callback: `delete_get_calendar_cache`)
STOP: 10:save_post, Taken 179.052μs (Callback: `delete_get_calendar_cache`)
START: 10:save_post, (Callback: `sharing_meta_box_save`)
STOP: 10:save_post, Taken 247.002μs (Callback: `sharing_meta_box_save`)
START: 10:save_post, (Callback: `Jetpack_Likes_Settings::meta_box_save`)
STOP: 10:save_post, Taken 25.988μs (Callback: `Jetpack_Likes_Settings::meta_box_save`)
START: 10:save_post, (Callback: `The_SEO_Framework\Load::delete_excluded_ids_cache`)
STOP: 10:save_post, Taken 185.966μs (Callback: `The_SEO_Framework\Load::delete_excluded_ids_cache`)
START: 10:save_post, (Callback: `SyntaxHighlighter::mark_as_encoded`)
STOP: 10:save_post, Taken 15.020μs (Callback: `SyntaxHighlighter::mark_as_encoded`)
START: 10:save_post, (Callback: `AMP_Post_Meta_Box::save_amp_status`)
STOP: 10:save_post, Taken 12.875μs (Callback: `AMP_Post_Meta_Box::save_amp_status`)
START: 20:save_post, (Callback: `Publicize::save_meta`)
STOP: 20:save_post, Taken 377.893μs (Callback: `Publicize::save_meta`)
START: 9000:save_post, (Callback: `Debug_Bar_Slow_Actions::time_stop`)
STOP: 9000:save_post, Taken 14.067μs (Callback: `Debug_Bar_Slow_Actions::time_stop`)Code language: CSS (css)

class VIP_Hook_Timeline {
	public $hook;
	public $callbacks     = [];
	public $callback_mod  = 0.0001;
	public $callback_mods = [];

	public function __construct( $hook ) {
		$this->hook = $hook;
		add_action( 'all', array( $this, 'start' ) );
	}

	public function start() {
		// We only want to get a timeline for one hook.
		if ( $this->hook !== current_filter() ) {
			return;
		}

		global $wp_filter;

		// Iterate over each priority level and set up array.
		foreach( $wp_filter[ $this->hook ] as $priority => $callback ) {
			// Make the mod counter if not exists.
			if ( ! isset( $this->callback_mods[ $priority ] ) ) {
				$this->callback_mods[ $priority ] = $priority - $this->callback_mod;
			}

			// Make the array if not exists.
			if ( ! is_array( $this->callbacks[ $priority ] ) ) {
				$this->callbacks[ $priority ] = [];
			}

			// Iterate over each callback and set up array.
			foreach( array_keys( $callback ) as $callback_func ) {
				if ( ! is_array( $this->callbacks[ $priority ][ $callback_func ] ) ) {
					$this->callbacks[ $priority ][ $callback_func ] = [ 'start' => 0, 'stop' => 0 ];
				}
			}
		}

		foreach( $this->callbacks as $priority => $callback ) {
			foreach ( array_keys( $callback ) as $callback_func ) {

				// Get data befmore we move things around.
				$human_callback = $this->get_human_callback( $wp_filter[ $this->hook ][ $priority ][$callback_func] );

				// Modify the priorities.
				$pre_callback_priority = $this->callback_mods[ $priority ];
				$this->callback_mods[ $priority ] = $this->callback_mods[ $priority ] + $this->callback_mod;

				$new_callback_priority = $this->callback_mods[ $priority ];
				$this->callback_mods[ $priority ] = $this->callback_mods[ $priority ] + $this->callback_mod;

				$post_callback_priority = $this->callback_mods[ $priority ];
				$this->callback_mods[ $priority ] = $this->callback_mods[ $priority ] + $this->callback_mod;

				// Move the callback to our "new" priority.
				if ( $new_callback_priority != $priority ) {
					$wp_filter[ $this->hook ]->callbacks[ strval( $new_callback_priority ) ][ $callback_func ] = $wp_filter[ $this->hook ]->callbacks[ $priority ][ $callback_func ];
					unset( $wp_filter[ $this->hook ]->callbacks[ $priority ][ $callback_func ] );
					if ( empty( $wp_filter[ $this->hook ]->callbacks[ $priority ] ) ) {
						unset( $wp_filter[ $this->hook ]->callbacks[ $priority ] );
					}
				}

				// Add a new action right before the one we want to debug to capture start time.
				add_action( $this->hook, function( $value = null ) use ( $callback_func, $priority, $human_callback ) {
					$this->callbacks[ $priority ][ $callback_func ]['start'] = microtime( true );

					// Uncomment this if you just want to dump data to the PHP error log, otherwise add your own logic.
					//$message = 'START: %d:%s, (Callback: `%s`)';
					// phpcs:ignore WordPress.PHP.DevelopmentFunctions.error_log_error_log
					//error_log( sprintf( $message,
					//	$priority,
					//	$this->hook,
					//	$human_callback,
					//) );

					// Just in case it's a filter, return.
					return $value;
				}, strval( $pre_callback_priority ) );

				// Add a new action right after the one we want to debug to capture end time.
				add_action( $this->hook, function( $value = null ) use ( $callback_func, $priority, $human_callback ) {
					$this->callbacks[ $priority ][ $callback_func ]['stop'] = microtime( true );

					// Uncomment this if you just want to dump data to the PHP error log, otherwise add your own logic.
					//$message = 'STOP: %d:%s, Taken %s (Callback: `%s`)';
					// phpcs:ignore WordPress.PHP.DevelopmentFunctions.error_log_error_log
					//error_log( sprintf( $message,
					//	$priority,
					//	$this->hook,
					//	$this->get_human_diff( $priority, $callback_func ),
					//	$human_callback,
					//) );

					// Just in case it's a filter, return.
					return $value;
				}, strval( $post_callback_priority ) );
				
			}
		}
	}

	public function get_human_callback( $callback ) {
		$human_callback = '[UNKNOWN HOOK]';
		if ( is_array( $callback['function'] ) && count( $callback['function'] ) == 2 ) {
			list( $object_or_class, $method ) = $callback['function'];
			if ( is_object( $object_or_class ) ) {
				$object_or_class = get_class( $object_or_class );
			}
			$human_callback =  sprintf( '%s::%s', $object_or_class, $method );
		} elseif ( is_object( $callback['function'] ) ) {
			// Probably an anonymous function.
			$human_callback =  get_class( $callback['function'] );
		} else {
			$human_callback =  $callback['function'];
		}
		return $human_callback;
	}

	public function get_start( $priority, $callback_func ) {
		return (float) $this->callbacks[ $priority ][ $callback_func ]['start'];
	}

	public function get_stop( $priority, $callback_func ) {
		return (float) $this->callbacks[ $priority ][ $callback_func ]['stop'];
	}

	public function get_diff( $priority, $callback_func ) {
		return (float) ( $this->get_stop( $priority, $callback_func ) - $this->get_start( $priority, $callback_func ) );
	}

	public function get_human_diff( $priority, $callback_func ) {
		$seconds = $this->get_diff( $priority, $callback_func );

		// Seconds.
		if ( $seconds >= 1 || $seconds == 0 ) {
			return number_format( $seconds, 3 ) . 's';
		}

		// Milliseconds.
		if ( $seconds >= .001 ) {
			return number_format( $seconds * 1000, 3 ) . 'ms';
		}

		// Microseconds.
		if ( $seconds >= .000001 ) {
			return number_format( $seconds * 1000000, 3 ) . 'μs';
		}

		// Nanoseconds.
		if ( $seconds >= .000000001 ) {
			// WOW THAT'S FAST!
			return number_format( $seconds * 1000000000, 3 ) . 'ns';
		}

		return $seconds . 's?';
	}
}
new VIP_Hook_Timeline( 'save_post' );Code language: PHP (php)