Improve TTFB Speed For CMS Sites

Related to ticket (266808) One of the issues we identified with regard to the speed of this customers website was the TTFB seemed high. Especially the 'Waiting' part of the request. On average the TTFB for this customers site was 2-5 seconds. Of course there are many variables at play but I think it would be good to review this customers site and others to see where the slowness on the request is coming from. If slowness is on our server maybe we could aim to improve this.