Serial Monitor causing Raspberry Pi 1 Model B to hang. Raspberry Pi's fault?

Hi, I'm programming the Uno using the Raspberry Pi 1 Model B.

When I use the Serial Monitor without a significant delay, the Pi hangs.

I've never tried the Pi with my Mac yet because I don't want to install Java just yet with all the Java scare for several years.

I'm wondering if this inability to keep up with the Serial is the Raspberry Pi's fault for not being powerful enough or will this happen even if use the Serial Monitor on my Windows/OSX machine?

Will the Raspberry Pi 2 solve this issue?

Thank you very much.