[MC-63090] Mouse stuttering when looking around and moving at the same time

Mouse stutters badly when I'm moving (and propably loading chunks). I assume it's because game uses all my CPU power, however lowering process priority, which technically should help, actually does not.

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galaxy_2alex 2014-07-23T16:07:22Z

Invalid
Lower your graphical settings, your system probably can't handle your current settings.

Bob Saggot 2014-07-23T16:19:10Z

This doesn't happen in 29a where there's no threading. Please reopen.

galaxy_2alex 2014-07-23T17:20:17Z

Make a screenshot while F3 screen is open and put the screenshot on here.

Bob Saggot 2014-07-25T17:09:14Z

Well, actually whole game stutters like hell whenever I move and load chunks (I guess?). I had lower FPS in 29a and smoohly fly in creative mode and load new terrain. Now I have high FPS and lag spikes that sometimes cause my mouse to rotate by 180 degrees.

Joshua Jones 2014-10-02T18:42:37Z

Nvidia GTX 550ti, i3-3220. 16 chunk view distance.

I have this bug in recent versions (I'm running 1.8- I can check previous snapshots and try to see when exactly it started). I can understand the argument about performance issues being down to needing to reduce settings. However, I think this should be treated as a bug for the following reasons (please bear with me, I have tried to be succinct):

Standing still, my FPS is fine (vsync so capped at 60fps, but outdoors with lots of stuff to look at - i.e. not in a cave staring at a wall)

If I move, of course the FPS drops, which is to be expected. However trying to look around or 'steer' while running doesn't just feel like running in a low FPS game. The expected outcome when FPS is lower (how it works in other games) is that the angle you are looking is still tracked essentially in real-time, but the screen updates like a slideshow (relative to higher FPS - of course I don't get a slideshow on my PC). Whether this is technically correct I don't know but its how it feels.

What actually happens now in Minecraft, at least when affected by this issue, is that the mouse seems to not always be tracked consistently. So even though the FPS is around 30, moving the mouse is very inconsistent, giving a horrible user experience. (i.e. moving the mouse at a constant speed gives randomly increasing and decreasing sensitivity as you move)

As soon as I stop walking/running this effect disappears, and I have never had this problem prior to 1.8 and the multithreading.

I don't know if it is bad form to request a bug be reopened but please consider the above.