I read about APC (Alternate PHP Cache):
And read that Drupal speeds up a lot once that is install, according to those benchmarks:
I'm guessing it will help Gallery also. However, when I tried to install it myself (in my directory on their server, so I can use only for my hosts) via ssh, phpize returns the following error:
Cannot find autoconf. Please check your autoconf installation and the $PHP_AUTOCONF
environment variable is set correctly and then rerun this script.
I cannot install the extension, even for just myself. I wonder if Dreamhost can do anything for us... I'd suggest they can install it but leave it disabled by default (by setting apc.enabled to 0 in their php.ini), since it is rarely needed. Those who need it can put the following directive in their .htaccess file:
php_flag apc.enabled on
And that would enable it!