When reloading world/s several times without closing the whole client, the game suddenly becomes extremely stuttery, completely unplayable. This can happen after only about 5 reloads or take up to ~50 reloads. Once the game is restarted it's back to normal. I know of another person who experiences the exact same thing (on a Mac, I'm on Windows), and I know that unless you're testing things you're not likely to reload that often, so I think many, if not all people can experience it.
MC-81031
Extreme Stutter After Multiple Relogs
Resolved
Incomplete
0
After experiencing the stutter:
Please force a crash by pressing F3 + C for 10 seconds while in-game and attach the crash report (
[minecraft/crash-reports/crash-<DATE>-client.txt|http://hopper.minecraft.net/help/finding-minecraft-data-folder]) here.Please attach the complete output of the "Game Output (Your Minecraft name) " which can be found on the fourth tab of the launcher.
If the launcher closes after game start, please edit your profile and select "Launcher visibility" then, "Keep the launcher open".