langmemusage.php

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<?php
use MediaWiki\MediaWikiServices;

require_once __DIR__ . '/../Maintenance.php';
require_once __DIR__ . '/languages.inc';

class LangMemUsage extends Maintenance {

    public function __construct() {
        parent::__construct();
        $this->addDescription( "Dumb program that tries to get the memory usage\n" .
            "for each language file" );
    }

    public function execute() {
        if ( !function_exists( 'memory_get_usage' ) ) {
            $this->fatalError( "You must compile PHP with --enable-memory-limit" );
        }

        $langtool = new Languages();
        $memlast = $memstart = memory_get_usage();

        $this->output( "Base memory usage: $memstart\n" );

        foreach ( $langtool->getLanguages() as $langcode ) {
            MediaWikiServices::getInstance()->getLanguageFactory()->getLanguage( $langcode );
            $memstep = memory_get_usage();
            $this->output( sprintf( "%12s: %d\n", $langcode, ( $memstep - $memlast ) ) );
            $memlast = $memstep;
        }

        $memend = memory_get_usage();

        $this->output( ' Total Usage: ' . ( $memend - $memstart ) . "\n" );
    }
}

$maintClass = LangMemUsage::class;
require_once RUN_MAINTENANCE_IF_MAIN;