Dev module reports 40-50 queries on Drupal homepage

The dev module reports 40-50 queries on a Drupal installation homepage, even with few or no extra modules at all!

W开发者_StackOverflowhat do you answer to someone that says that Drupal is not optimized and has many queries that it shouldn't have?

The default caching system solely targets anonymous users and does not improve performance for authenticated users. Authenticated users make minimal use of the cache.

Most websites tend to improve their performance through the use of contributed caching modules and server-side mechanisms such as caching proxies, HTTP accelerators and so on. See the following URLs for more information on the caching system in Drupal as well as a list of features of commonly recommended contributed modules:

• Caching resources
• Cache module comparison