Ive been testing Firefox e10s as in multiprocess Firefox for months now (in Nightly, and even before that).
At some point it became very usable and it still is today.
HOWEVER while the interface is, yes, much more responsive, it is also NOTICEABLY slower.
I ended up reverting recently and I'm using single process Firefox right now. Its fast even thus from time to time the UI may block if there's heavy stuff going on.
Whatever makes e10s slow they gotta fix it... I suspect there's a lot of synchronization code.
At some point it became very usable and it still is today. HOWEVER while the interface is, yes, much more responsive, it is also NOTICEABLY slower.
I ended up reverting recently and I'm using single process Firefox right now. Its fast even thus from time to time the UI may block if there's heavy stuff going on.
Whatever makes e10s slow they gotta fix it... I suspect there's a lot of synchronization code.