use an atomic operation to replace the cache with the new version

            time.sleep(1)

        with cache_lock:

            with open(cache_filename, "w", encoding="utf8") as file:

            cache_filename_tmp = cache_filename + "-"

            with open(cache_filename_tmp, "w", encoding="utf8") as file:

                json.dump(cache_data, file, indent=4)

            os.replace(cache_filename_tmp, cache_filename)

            dump_cache_after = None

            dump_cache_thread = None