I have a phabricator instance (n1-standard-8, 8 vCPU, 30 GB memory) and the performance is significantly slower than anticipated (~6 second just for document fetch to get a page load).
Initial suspicions pointed to send mail but I thought that setting metamta.mail-adapter to PhabricatorMailImplementationTestAdapter would resolve that. Is there anything else that may be causing this slow down?
Using Apache as well!
You can enable DarkConsole to find where Phabricator is spending time on page loads.
https://secure.phabricator.com/book/phabcontrib/article/darkconsole/