Performance Problems on Android

[NikittyS]

Hello. I have performance problems on Android - FPS drop from 59 to 47 when enable UI object with SoftMask.

Problem

• Drop FPS on Android device

Environment

• Device: Nexus 5
• Platform: Android 6.0
• Unity: 2019.3.0f6
• SoftMaskForUGUI: 1.0.0-preview.3

To Reproduce

1. Create Canvas
2. Create parent Image with SoftMask
3. Create child Image inside parent

This problem doesn't only on Nexus 5. I tried on other devices with Android 9.0 and the problem was the same. But fps depends on the performance of the device.

P.S. On iOS works perfectly.

Screenshots

Unity:

(Zoom_Under just copy of Zoom_Inside)

Nexus 5:

Object with SoftMask - disabled

Object with SoftMask - enabled

Can you help with that problem? Thank you!

[mob-sakai]

@NikittyS

• Change Desampling Rate to x1 or x2
• Another solution: https://github.com/mob-sakai/UnmaskForUGUI

If the soft mask buffer is being updated every frame, it's probably a bug. Could you please attach a minimal project that reproduces the issue?

[NikittyS]

@mob-sakai

Hello. I'm tried set Desampling Rate to x2, it give 49-50 fps (from 59).

I made one mistake when I said about fps falling with only one object with SoftMask. One object doesn't reduces fps, but two objects reduces.

Minimal project SoftMaskTest.zip

[mob-sakai]

It's interesting.

On my Android device (Sony Xperia XZ), FPS didn't drop. So I added 20 SoftMask, FPS dropped to 30.

[NikittyS]

In main project, I have around 150 movable objects with SoftMaskable. On my iPhone 6s stable 60 fps, but Nexus 5 show ~20-25 fps.

[mob-sakai]

I improved performance.

• The pixel shaders in SoftMaskable shaders has been optimized.
• Add a new option to ignore stencil if it is not needed as a mask.

it gives 45-47 fps (from 30, with 20 SoftMasks).

[mob-sakai]

Try to use v1.0.0-preview.4

[NikittyS]

@mob-sakai Hello. Good work! Thank you! Nexus 5 with ~150 object now give 50 fps, that's good.

But I have one more little issue - when I updated SoftMask to 1.0.0-preview.4 SoftMask doesn't work when Canvas Render Mode set to Screen Space - Overlay, but if it set to Screen Space - Camera SoftMask work well.

[mob-sakai]

Thank you for testing, @NikittyS .

I tested it on a project you previously uploaded. (SoftMaskTest.zip)

• Update SoftMaskForUGUI to 1.0.0-preview.4

It uses Screen Space - Overlay as Canvas Render Mode. However, the problem did not reproduce in my environment...

• Editor (on Mac)
• Android 8.0 (Sony Xperia XZ)

Could you please attach a minimal project that reproduces the issue?

[NikittyS]

@mob-sakai

Hmm, I restarted Unity and everything was fine, sorry for this mistake.

Thank you for this best soft mask!