anchor.diff:  
   # Install vendor
   COPY ./composer.json /repo/composer.json
  -RUN composer install --prefer-dist --no-interaction --optimize-autoloader --classmap-authoritative
  +RUN composer install --prefer-dist --no-interaction --optimize-autoloader --apcu-autoloader
   
   # Add source-code
   COPY . /repo
  
positive.code: RUN curl -sS https://getcomposer.org/installer | php -- \
          --filename=composer \
          --install-dir=/usr/local/bin
  RUN composer global require --optimize-autoloader \
          "hirak/prestissimo"
  
  # Prepare application
  
negative.code: # Install pecl extensions
  RUN pecl install \
          mongodb \
          apcu \
          xdebug-2.7.1 && \
      docker-php-ext-enable \
          apcu.so \
          mongodb.so \
          xdebug
  
  