Add benchmark

[franz101]

While I assume the memory is very efficient I think a fair test would be chrome browser with 25 tabs open.

Curious on other suggestions

[krichprollsch]

Hello @franz101,

Our current comparison with Chrome lands on https://github.com/lightpanda-io/demo
Did you check this repo?

[krichprollsch]

I'm closing for now, feel free to reopen.