Cachex among other patterns fixes that (depending on type of data), but it’s by design because each are different processes and so forth.
The server resources are pretty light, but yeah I agree, I use unpoly.js for most of my things to ‘enhance’ a page to work faster, I highly recommend looking at it, you can even optimize sending requests back to minimize data sent too (or don’t change anything on the server side).
Absinthe on the other hand is awesome, but it requires a lot of client-side scripting, just make sure you don’t break text clients like elinks or links2 or so. 
