I've got some spare time this week so want to take a closer look at this for my Wordpress sites.
My host offers a free Cloudflare setup within Cpanel (which I use with the default settings) and I install W3TC set up as per numerous beginners guides found on the web. It is shared hosting but I pay more for extra CPU, RAM, I/O and a dedicated IP if that makes any difference. The sites are nothing special, they use paid themes, plugins are kept to a minimum and I follow all the obvious stuff with optimising images etc.
Pingdom and GTMetrix give me scores of +90% whereas PageSpeed Insights typically gives average scores. A site I've been playing with this morning has 95 on GTMetrix and 63 on PageSpeed.
I've read a fair amount of criticism about PageSpeed, ironically by caching blogs, so I'm wondering if I'm wasting my time trying to implement the suggestions anymore than I do now. It may point out something obvious I've missed but it suggested I should shave 7KB off a 73KB image this morning.
I'm also reading lots of good things about WP Rocket, so does anyone have any experience with that over W3TC ?