LocalisationCacheBulkLoad.php

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<?php
class LocalisationCacheBulkLoad extends LocalisationCache {

    private $fileCache = [];

    private $mruLangs = [];

    private $maxLoadedLangs = 10;

    protected function readPHPFile( $fileName, $fileType ) {
        $serialize = $fileType === 'core';
        if ( !isset( $this->fileCache[$fileName][$fileType] ) ) {
            $data = parent::readPHPFile( $fileName, $fileType );

            if ( $serialize ) {
                $encData = serialize( $data );
            } else {
                $encData = $data;
            }

            $this->fileCache[$fileName][$fileType] = $encData;

            return $data;
        } elseif ( $serialize ) {
            return unserialize( $this->fileCache[$fileName][$fileType] );
        } else {
            return $this->fileCache[$fileName][$fileType];
        }
    }

    public function getItem( $code, $key ) {
        unset( $this->mruLangs[$code] );
        $this->mruLangs[$code] = true;

        return parent::getItem( $code, $key );
    }

    public function getSubitem( $code, $key, $subkey ) {
        unset( $this->mruLangs[$code] );
        $this->mruLangs[$code] = true;

        return parent::getSubitem( $code, $key, $subkey );
    }

    public function recache( $code ) {
        parent::recache( $code );
        unset( $this->mruLangs[$code] );
        $this->mruLangs[$code] = true;
        $this->trimCache();
    }

    public function unload( $code ) {
        unset( $this->mruLangs[$code] );
        parent::unload( $code );
    }

    protected function trimCache() {
        while ( count( $this->data ) > $this->maxLoadedLangs && count( $this->mruLangs ) ) {
            reset( $this->mruLangs );
            $code = key( $this->mruLangs );
            wfDebug( __METHOD__ . ": unloading $code\n" );
            $this->unload( $code );
        }
    }

}