Develop Reference

Why does scripting backend slow down android app?

I am trying to make an Android app in Unity that uses some heavy computation, when I tried to publish it to the google developer console I got an error "This release is not compliant with the Google Play 64-bit requirement"
After some digging around I found that I need to change the Scripting Backend to IL2CPP Instead of Mono and un-select x86
Now Google lets me publish the app, but when I build and run it on my phone it is significantly slower, should I be worried about this? If so is there any way to fix this? (when I change Scripting Backend back to Mono and build and run the app doesn't lag any more when it's running, perhaps there are some different settings that I need to use?)
What I read so far was that the Scripting Backend IL2CPP is supposed to be faster as far as when the app is run, but at least on my phone this doesn't seem to be the case
The phone I'm using to test this is a ZTE Blade, Model number Z965 (I think it's called ZTE Blade X but I'm not sure)in case that's useful

I (might have) found the reason for the lag from this post:
https://forum.unity.com/threads/huge-fps-drops-from-60fps-armv7-to-25-30-fps-arm64-unity-2017-4-20.682018/
It seems that any logging operations take a long time using the ARM64 architecture(I ran the app using the ARMv7 and ARM64 architecture and the ARMv7 didn't lag that much) now that I changed every logging setting to "none" the app seems to run more smoothly(anyway at least I hope that was the only problem)

Android Virtual Device Loads Very Slow

I am using a remote desktop having configured Win 8.1, 3gb ram DDR2, 15gb HDD free space, latest Xamarin Studio Starter version with api 21 packages. When I try to debug a simple "Hello World" solution on studio, the manually created AVD loads too slow, even android home screen does not appear after 1 hour. What should I do to speed up the process ?

I don't know if your IDE supports it but you should really try out Genymotion, it changed my development time and testing significantly.
https://www.genymotion.com/

Considering your configuration, 1 hour is too much, try restarting first.
If not go for your Android device(physical), I debug on my mobile(you don't have to wait for your mobile to start).
You Can also go for Genymotion . Many find difficulty in genymotion setup. it is pretty simple though, follow this video If you'll understand once about VirtualBox and IP, it'll be easy for next time
I would recommend 6GB Ram and i5 processor for performance lag problem. So if it is possible, you should upgrade your machine.

Thanks for your responses. Finally I have resolved the issue by creating a low resolution Android Virtual Device (Nexus One) by Xamarin Studio.
But another problem arises, the published apk file is too large.Which steps need to be done to make it perfect ?

You should try the Xamarin Android Player. In my experience it's the fastest option over Genymotion and Android's AVD images even with Intel's HAXM installed.
https://www.xamarin.com/android-player

Slow application startup using ClickOnce deployment

we are deploying our application with ClickOnce and we noticed that when we start our application by clicking the ClickOnce desktop icon, the application start slower (it takes at least 30-60 seconds more) than while started directly from the .exe.
I've seen that it's not an unkown issue ( Slow startup of Clickonce winforms application after update ) but it seems it's still unresolved.
I'm wondering why that would happen and how to fix that.
I'm only using one machine so I guess it's not machine-related, not antivirus-related.
I'm noticing different memory management pattern during startup: the ClickOnce deployment takes more time and after a while it deallocates some memory.
We are still talking about 12 MBytes in difference ( 67MB via ClickOnce, 50 via direct .exe).
This is driving me nuts...
Thanks

I guess it's not machine-related, not antivirus-related.
You need to prove that hypothesis by installing the same anti-virus your client has on a dev VM. If you cannot reproduce the slow start up compare ProcMon traces between the machines.
I believe Hans is on the money and the anti-virus is the most likely culprit, as per the correct answer in the QA you refer to in your question:
I have seen very poor performance (minutes vs a few seconds) for a newly deployed first run .Net application is the users are running antivirus software as the antivirus tool checks the newly Jitted assemblies are not malicious.
Make sure you're using .NET Framework 3.5 SP1 or above as "there are significant performance improvements in the area of startup. Particularly with WPF applications" and 3.5 SP1 includes Splash Screens.
A Splash Screen could be a quick (temporary) fix. Alas, not an ideal solution.
ClickOnce is getting pretty old now and there have been a lot of advancements in this field so why not adopt another strategy with a different deployment mechanism, such as Windows Installer and an Update Menu in the app. I detail the steps to make an MSI installer to Install to same path when upgrading application.
If you want to be strict about everyone being on the latest version instead of ClickOnce it would be better to have a web service the app pings on start up and downloads and executes the update when a new version is released.
Also, take tips from Google in this area. You remember the Jeff Atwood article: http://blog.codinghorror.com/the-infinite-version/
If you dont use ClickOnce you can use things like NGEN AND bsdiff, possibly even Google courgette.
There's some other ways to speed up the startup of a ClickOnce application discussed here.
While this may not answer your question directly, hopefully it gives you food for thought on how to identify the root cause and/or use a different more up-do-date method for rolling out updates.

When you publish the build please choose the option of running the app in offline mode. Otherwise the clickonce installer will try to launch the app from your server rather than local exe.
Please let me know if there are any other scenarios need to look into or this helps.
Thanks,

XNA 4.0 game doesn't do anything when ran on another PC

This issue is getting real tiresome and I've been spending atleast 2 days looking around for an answer. Basically, I want to publish a game, and I've hired a friend of mine to test it out before I officially release it. Whenever he runs it, reports as "nothing happends".
These conditions are met:
He has installed the .NET Framework 4.0 and the XNA Redistributable 4.0 (he most likely also has installed other .NET Frameworks and XNA Frameworks as well, because nothing worked).
The game is compiled onto a Release build.
GamerService referenced is removed.
A possible issue could be that he's using Win8, but as my searching experience goes, XNA DEVELOPMENT is only restricted on Windows 8, right?
So, what's going on? I'm clueless.. I even put a MessageBox.Show(); after the execution of my game in my Program.cs file via try/catch, and no results.
Are there any extreme conditions in my code that I need to meet?
Any site describing 100% of all requirements to run an XNA game and the most proper way to build it?
Any issues when using non-distributable "developer tools" in XNA coding? If so, what includes in these "developer tools", and what do I need to modify? (I noticed that on another thread).
An answer to this issue would more than make my day...
Ah, and also, I tried running it on a virtual machine ( Windows 7 ) but then it spat out a messagebox saying Index outside the bounds of the array on a perfectly valid code execution, and various other random errors such as missing files when they clearly are there.
Thank you greatly!

In summary I think your app wont run on Windows 8, let me explain:
Windows 8
A possible issue could be that he's using Win8, but as my searching experience goes, XNA DEVELOPMENT is only restricted on Windows 8, right?
Officially, desktop games using unmodified Microsoft XNA 4/is not supported on Windows 8 in any form:
Microsoft officials have said the XNA tools/runtime environment used primarily by game developers isn't supported on Windows 8. - Read more...
Redistributables
Any issues when using non-distributable "developer tools" in XNA coding?
That depends on whether they are required at runtime on the target machine. That might sound like an oxymoron but in Windows c/c++, I can have an app that depends on Microsoft DLLs but we are not allowed to deploy the DLLs, one must depend on it being present in the OS; service pack or some other form. Is there something you are missing?
Windows 7
Ah, and also, I tried running it on a virtual machine ( Windows 7 ) but then it spat out a messagebox saying Index outside the bounds of the array on a perfectly valid code execution
This is more interesting and I suspect is one of the more testable aspects of your application (also that it is not Windows 8). I suggest you setup a remote-debug session to your Win7 VM or if that is not possible, use Debug.WriteLine() or equivalent displaying critical state contents.

VS 2013 debugging very slow IIS start

When I am working in a project that several of my colleagues work in too I have significantly longer starting time of IIS than the others.
Almost every page in the application takes ages (the first time) but after that it goes smooth. The difference in loading time is like 1-2 seconds for my colleagues and 5-12 seconds for me. My computer is BY FAR the most powerful in terms of internal memory, hard disk speed, CPU speed and more. Almost twice as fast as others, but still I get this problem.
I don't have any other problems with my machine.
We all use: VS 2013, Chrome 35.019, C#
I use: IIS version 8.5, Windows 8.1
Colleagues use: IIS version ?, Windows 7 and Windows 8

Spotify can affect VS and IIS performance on certain hardware. If you have this problem and you are using Spotify, try to turn it off and see if it works better.