The following benchmark proves that a traditional single site Drupal setup isn’t any faster than its multisite counterpart.

Tested setups:

  1. Single site installation of Drupal 6.17 from Drupal.org
  2. Multisite installation of Drupal 6.6 from Debian Lenny. Although there’s a version difference and Debian’s release lags behind by a number of versions, it has the latest security patches applied.

Benchmark data by ApacheBench as per commands:

  1. ab -n 100 -c 10 http://drupal_single_site_address.tld
  2. ab -n 100 -c 10 http://drupal_multisite_address.tld

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