[vletal]

I've just tried it on 2014 MacBook Pro with Intel Iris GPU. It seems it bit more sluggish than the built in Terminal app.

No hard numbers, yet simply resizing a window is visibly slow or "accidentally" catting 100k line txt file in the terminal takes several seconds. Both is instant in iTerm and Terminal on my machine.

[floatboth]

Isn't Apple's terminal already GPU-rendered too? Or was that iTerm2…

[sigzero]

iTerm2 can be (it's configurable). Not sure about Terminal.