Tirual Would this have the same significant reduction when combined with Cloudflare and SuperCatcher from Siteground Hosting?
CloudFlare by default only caches static content like images, while this extension helps in caching dynamic resources like HTML views and JSON-API requests. So when you have CloudFlare enabled you won't have any caching benefit at the CDN edge, and all the traffic has to go through CloudFlare and then you server. Depending on the place where you browse the website it might be in general a little slower than going direct, with or without this extension.