old_contents: from os import getenv
  
  METADATA_CACHE_SIZE = int(getenv('GUTENBERG_HTTP_METADATA_CACHE_SIZE', '256'))
  BODY_CACHE_SIZE = int(getenv('GUTENBERG_HTTP_BODY_CACHE_SIZE', '16'))
  SEARCH_CACHE_SIZE = int(getenv('GUTENBERG_HTTP_SEARCH_CACHE_SIZE', '32'))
  
new_contents: from os import getenv
  
  METADATA_CACHE_SIZE = int(getenv('GUTENBERG_HTTP_METADATA_CACHE_SIZE', '1024'))
  BODY_CACHE_SIZE = int(getenv('GUTENBERG_HTTP_BODY_CACHE_SIZE', '64'))
  SEARCH_CACHE_SIZE = int(getenv('GUTENBERG_HTTP_SEARCH_CACHE_SIZE', '128'))
  
subject: Increase cache sizes