benchmarkHooks.php

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

class BenchmarkHooks extends Benchmarker {
    protected $defaultCount = 10;

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

    public function execute() {
        $cases = [
            'Loaded 0 hooks' => 0,
            'Loaded 1 hook' => 1,
            'Loaded 10 hooks' => 10,
            'Loaded 100 hooks' => 100,
        ];
        $benches = [];
        foreach ( $cases as $label => $load ) {
            $benches[$label] = [
                'setup' => function () use ( $load ) {
                    global $wgHooks;
                    $wgHooks['Test'] = [];
                    for ( $i = 1; $i <= $load; $i++ ) {
                        $wgHooks['Test'][] = [ $this, 'test' ];
                    }
                },
                'function' => function () {
                    Hooks::run( 'Test' );
                }
            ];
        }
        $this->bench( $benches );
    }

    public function test() {
        return true;
    }
}

$maintClass = BenchmarkHooks::class;
require_once RUN_MAINTENANCE_IF_MAIN;