Yes. Thank you for explaining it like i dont understand.

And yes atleas google is preloading emails. You can test it easily.

Open your gmail in browser. It shows you 50 first mails. Then disconnect your internet. You can open any of the 50 mails and read them in full. Even the large pictures load.

Also if you click from the "next page" arrow the 50 mail set you are in will open after disconnectin no matter how far you have gone in the history.

This works even with pc you are logging in the first time.

The speed this is happening is also good indicator there is server side preloading happening in addition to client side things.

So i say again. I would love to have some real numbers how much there is happening on the behind and with how many users. I feel like it is really insignificant total in the grand picture of the things, but it would be nice to know things instead of just feeling.