Server response time

[A P W Trading]

Varnish cannot be used for https in native mode if you are going to run varnish for https you will probably need to run Nginx

[MagenX]

Varnish on AWS - https is not the only problem, if you have load balancer or auto scaling, you have to use some custom automation, otherwise aws clustering will screw your work...

[iweb_insom]

Hi,

Varnish can handle HTTPS now - they've released their own version of Bumptech's `stud` HTTPS proxy called `hitch`. It's also available as part of Varnish Plus. (I was a contributor to another `stud` fork, and think it's pretty good).

Like davidclarkny2 said, you are looking at spending quite a bit of money to put a "best in class" kind of hosting package together: Varnish, Redis, CDN & fast servers. If you only care about TTFB for SEO reasons, you can probably cheat a little with packages like Nitrogento - the site will still perform slowly when users add to their basket and try and check out - there's no getting around spending money to make the whole site fast - but if web spiders like Google are hitting the cached version of your site they will hopefully register the faster TTFB.