WordPress Action logger

action-logger.php

<?php
class ActionLogger {

	static $started;
	static $prev;

	static function start() {
		self::$started = hrtime(true);
		self::$prev = hrtime(true);
		add_action('all', [self::class, '__action_all'], 10000);

	}

	static function __action_all() {
		$action = current_filter();

		if (in_array($action, ['esc_html', 'gettext', 'graphql_field_definition'])) {
			return;
		}

		$diff = self::to_ms( (hrtime(true) - self::$prev) );
		$pos = self::to_ms( (hrtime(true) - self::$started) );

		if ($diff < 0.1) {
			return;
		}

		error_log("ACTION ${pos}ms $action  $diff ms");

		self::$prev = hrtime(true);

	}

	static function to_ms($nanoseconds) {
		return $nanoseconds / 1e+6;
	}
}

ActionLogger::start();