I am using Hummingbird to do all the caching things.
And it works perfectly fine. But just for home page, when I see the source code, it shows some comments like this:
<!-- Hummingbird cache file was created in 2.1263468265533 seconds, on 11-01-18 7:25:35 -->
It help me confirming that the cache for this page was created. But if I move to sub pages like this one: https://www.**trend.se/produkt/guess-willow-w0822l2/
And view the source code, it doesn't have the comment like the one home page had. This means the cache is not enabled in sub pages, right?