Benchmark for single WordPress action hook

benchmark-for-single-wordpress-action-hook

<?php
define( 'ITERATIONS', 1000000 );

require( __DIR__ . '/wp-load.php' );

add_action('my_action', '__return_null' );

header('Content-type: text/plain');
time_it( 'hook an action with no parameters: ', function($condition) { do_action('my_action'); });

function time_it( $what, $callable ) {
	$time_start = microtime( true );
	$condition = true;
	for ( $i = 0; $i < ITERATIONS; $i ++ ) {
		call_user_func( $callable, $condition );
		$condition = !$condition;
	}
	printf( "\n%s %s %.3f",
		number_format(ITERATIONS),
		$what,
		$delta = microtime( true ) - $time_start
	);
	return $delta;
}