Potential band-aid for Meltdown

[Cranix]

How about smartcards?
J3A081 costs $10 on javacardsdk.com, both
contact less and wired connections, readers if not
built in into laptop are generally cheap.

There are also a few tools like GlobalPlatformPro
that help when developing things for javacards.
Basicly You have some java and prepared ant, then
You just call ant and have everything working.
I had to quickly set up this enviroment few months ago
and it was painless experience.

Question is about performance but anyway we need secure storage.
Some cortex (propably m) microcontrollers have secure storage of keys,
this is also a thing to consider.

Trusting vendor is other thing but everybody has to anser this question
by himself.
-- 
Cranix