LWRP bad performance on mobile.

I want to make a mobile racing game and since the high end phones have pretty similar performance to a slighly older iGPU, I thought that using shadowmask would be nice to have those realistic shadows.LWRP doesn't have that option yet. I didn't want to switch to Built-in, because of the new Shadergraf and Visual effects graf.

Yesterday I wanted to test just jow much faster LWRP is, but to my surprise it was ~25% slower on the same scene. I was getting 40 on Built-in and 30FPS on LWRP on a simple test scene and in the editor on a HD530 I got like 85 vs 60FPS. I saw that others had the same issue too, so it's not just me.
Also the Post processing stack with Color Grading, Vignette and Bloom cuts the FPS in half on mobile.

I didn't test it without shadows yet or with unlit shaders to figure out what causes the problem, but I find this really weird.

 

I have no idea what happened, now it works as it should, despite the fact that I didn't do anything to it. It must have some kind of bug I guess.

 

I made an empty scene in lwrp mode and run it on samsung j5. it show 40fps. I made the same empty scene with built-in rendering pipeline and it run at 60fps. I use the official release of Unity 2019.1. I use Opengl Es 3 as graphic API. Why lwrp has poor performance?!

 

Please download my complete project. This is an empty scene made with Unity 2019.1 LWRP. also an apk file for android included. Test it on Samsung J5 2016. I get 45 FPS.
https://www.dropbox.com/s/yh0fkof00i130j0/lwrp empty.7z?dl=0

 

This is the direct link of the apk file for anybody who wants to check it with his android phone.
https://www.dropbox.com/s/ds4azivfbs4ga0v/game.apk?dl=0

 

Did you ever succeed in getting better performance from LWRP than the SRP?

 

No. LWRP is very unstable and unpredictable. On different Android phone has different behavior. It is not ready to use in production. I don't know why Unity released it as production ready solution. They should test it on low end and mid range android phones from Samsung and Huawei. The goal of LWRP is to develop games for low performance mobile phones and should be tested with low end Android phones before releasing it.

 

Also I didn't use any post processing on the Camera.
I tested it on Samsung j5 2015 and j5 2016 and it shows 45 fps and then tested it on LG L90 D405 ( A 2014 low end android phone) and it shows 60 fps.

 

I changed the camera background type to Solid Color and it now runs at 60 fps! So something is wrong with skybox rendering!
I just used default Unity skybox before.

 

I did it.
The problem may be skybox shader. In LWRP mode there is not a skybox shader under "Lightweight Rendering Pipeline" menu when creating a material for it.

 

Did you find any solution for it?

 

Case 1149049

 

I provided all information to them by email. Here I shared my project and the apk file of my test project but they don't care.They didn't respond to my email. Do you get 60 FPS by running my apk file? Did you test it ever? Could you give me your apk file to test it on my phone? It seems no body care about this issue.

 

I got an email from customer QA team:

Hi,
We successfully reproduced this issue and have sent it for resolution with our developers.

We highly appreciate your contribution. If you have further questions, feel free to contact us.

 

Is the issue already resolved?

 

No, There is no response from Unity developers!

 

Would like to know if this issue is resolved

 

Hi,

May I ask what’s the status of this one?

 

Is this issue resolved? A simple yes or no would be good, given how long its been and how many people are asking. @aleksandrk

 

Okay great thanks for the reply @aleksandrk , altho it appears URP now has some bad performance across the board (on empty scenes and stuff ,theres a number of threads around here about them). I had thought LWRP would be usable in production by now but you guys changed it to URP, and as a result it seems to be back at alpha in terms of usability, stability and performance despite being touted as a "name change".

 

I tried LWRP and the performance has a lot to be desire. Few issues with VR. I don't think LWRP should be released just yet. I guess the folks from UNITY made a big fuss about the LWRP but they should have LWRP 100% bullet prove before release it to the community.

 

same issue on low-tier mobile devices.
I got almost 50% drop fps when switch to lwrp with simple empty scene with no additional effects, shaders etc.
Unity must show common mobile settings to use for lwrp with no performance drop

 

I would like to follow this up, I built an empty (only with one camera) URP 2D scene on to a Samsung A12 device from an empty project, with lowest quality settings and it still only give me 20 FPS. Is this a bug?

I am using Unity 2020.3

 

It still stick with 20FPS.

If I use Application.targetFrameRate = 60 at start function in an empty scene with one camera (URP). It can go up to 30 FPS

 

Does it mean the the max. FPS that this device can achieve is only 30FPS? Is it possible that other games on the same device can achieve up to 60FPS? Can you explain more, please?

 

thanks, do you mean other settings on the Unity project? Or settings on the android device itself?

I have also deployed the same project on Samsung A40, which that achieves 60FPS.

this is driving me crazy, do you have any suggestion on where I can find a solution to this? Thanks!

 

I found my own answer, I disable VSync Count off as I would need to set "Every V Blank"...