benchmarkHooks.php

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<?php
require_once __DIR__ . '/Benchmarker.php';

class BenchmarkHooks extends Benchmarker {
    public function __construct() {
        parent::__construct();
        $this->addDescription( 'Benchmark MediaWiki Hooks.' );
    }

    public function execute() {
        global $wgHooks;
        $wgHooks['Test'] = [];

        $time = $this->benchHooks();
        $this->output( 'Empty hook: ' . $time . "\n" );

        $wgHooks['Test'][] = [ $this, 'test' ];
        $time = $this->benchHooks();
        $this->output( 'Loaded (one) hook: ' . $time . "\n" );

        for ( $i = 0; $i < 9; $i++ ) {
            $wgHooks['Test'][] = [ $this, 'test' ];
        }
        $time = $this->benchHooks();
        $this->output( 'Loaded (ten) hook: ' . $time . "\n" );

        for ( $i = 0; $i < 90; $i++ ) {
            $wgHooks['Test'][] = [ $this, 'test' ];
        }
        $time = $this->benchHooks();
        $this->output( 'Loaded (one hundred) hook: ' . $time . "\n" );
        $this->output( "\n" );
    }

    private function benchHooks( $trials = 10 ) {
        $start = microtime( true );
        for ( $i = 0; $i < $trials; $i++ ) {
            Hooks::run( 'Test' );
        }
        $delta = microtime( true ) - $start;
        $pertrial = $delta / $trials;

        return sprintf( "Took %6.3fms",
            $pertrial * 1000 );
    }

    public function test() {
        return true;
    }
}

$maintClass = 'BenchmarkHooks';
require_once RUN_MAINTENANCE_IF_MAIN;