james martion

same behavior for me in 1.14.3 Pre-Release 2

(windowed mode clearly uses lcd native dpi where i want to play at reduced dpi , ie. scaled up

(2x scale option would give the same/similar effective behaviour as before while ensuring pixel boundaries align)

Can confirm 1.14.1 has same issue : Performance regression / degradation due to rendering at lcd native resolution rather than scaled on macOS / retina MacBook Pro

Wasn’t issue in 1.12

Only seeking option to render at a 2x scale when in windowed mode

Can confirm changed performance characteristics in the last few months (1.13)

What does the resolution say in Debug mode (f3, or Fn+f3 for me on my rMBP)?

Since bug MC-32327 was fixed, I've had to abandon Windowed mode or Mac-Native full screen and use Minecraft's full screen mode as a workaround, set to a reasonable resolution (1280x800 is fine for me on a 13" screen) **https://bugs.mojang.com/browse/mc-32327 

This is because when windowed or in Mac full screen mode, java is now drawing the 3d world at native retina resolution (2560x1600) rather than a lower resolution (1280x800) scaled up, which punishes my late 2013 laptop. (its 4x the pixels!)

MC's fullscreen mode is not a solution for me, it is a workaround. My machine needs to change resolution any time i go from game to the host OS which I have always done since i got onboard around the time of 1.2.x, and i can no longer run windowed without performance degradation combined with the laptop heating up excessively. 

I added a comment to https://bugs.mojang.com/browse/MC-32327 because that 'fix' broke minecraft performance for me on my late 2013 laptop. I wonder how many kids out there are complaing to their parents about a hot laptop

is a '2x scale' option to retain high FPS on high resolution screens too much to ask for? effectively returning 1.12 behaviour but more accurately describing the workings

The fix for this issue has caused issue for me.

This resulted in minecraft using the native screen resolution on my old Retina Macbook Pro instead of the faked half resolution. while this suits those who have computers with enough performance, I preferred and still prefer the lower resolution scaled up, as this was a lighter load on my computer.

since 1.13 any gaming i do on my laptop has it heating up considerably and the fan going crazy. f3 shows a much higher resolution than it used to for a given window size compared to 1.12

This fix may suit those who desire the native resolution but until finding this 'fix', the performance degradation was really jarring and confusing to me. How many more people (children!) would be playing on 'retina' macs and for no apparent reason having performance and battery life severely reduced??

request : add option to enable old behavior, ie '2x pixel scaling', within minecraft game itself

screenshot from a near-full screen window when version was prior to 1.13. a 1.13+ screenshot has those numbers doubled.