Enable Keep-Alive
Installation and Configuration
Keepalives should be enabled in your vhost or server config. They are not enabled by Jamroom nor are there plans to attempt to do that. Jamroom works with or without Keepalives, and for very busy servers it makes sense to disable them. Keepalives should have already been enabled on your server by your hosting provider - if they are not enabled, they can enable them in your domain vhost config:
https://httpd.apache.org/docs/2.4/mod/core.html#keepalive
If your hosting provider refuses to do that for you it's time to find a new hosting provider. My hunch is they are going to use that as an excuse for why your site is so slow, when in reality you're just on an overloaded server.