What I expected to happen is that I go back to minecraft after leaving my computer on for about 24 with minecraft running and I go back to playing it perfectly fine.

What actually happened is that I came back to my computer with minecraft running for 24 hours and the graphics are extremely choppy and I move like I have a Speed 20 potion effect. This does not affect mobs.

Steps to Reproduce:
1. Run minecraft on your computer and leave your computer untouched for about 12-24 hours.
2. After that 12-24 hours go back to the computer (Which is still running, no sleep mode), and try playing minecraft again.
3. You should get the affect along with changing settings and clicking the "done" button in options takes you back to the title screen extremely quickly.