I've been doing performance profiling of my Windows Phone application. I tested the average memory usage of my application (via ALT + F1). I get an average memory usage of 17MB but i don't have any clue if this result is good or bad? On what it depends?
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I want to detect low performance device in runtime in react native to disable complex lottie animation. I consider for use device model from react-native-device-info, but I should have a list of heigh performance phones
I'm also interested in this question and it would be fine to have some solution. I can think of using react-native-device-info and comparing following properties of device:
CPU architecture (32/64 bit)
total RAM available
total disk capacity
current android version
Maybe using these variables we are able to calculate some performance level with not that bad accuracy.
64bit + lets say at least 3GB RAM + 32GB capacity + one of newer Android version can be good indication that device should have some power inside.
on the other hands 32bit + 1/2GB RAM + max 8/16GB capacity + not that new Android version can lead to performance prblms.
Seriously let's talk about it :D Maybe we can find some good compromise and maybe write a lib or contribute to react-native-device-info with a feature that will try to suggest developers about device's performance.
consider use android version
we use this formula:
low android version === old phone === low performance
performance can be low if device is out of memory, too many applications opened, which browser used, etc... its hard to detect
when is neccesary, you can write small performance test in app before animations or on app load/initialization, and you can use these results.
It's possible to run any benchmark in background using web worker or use library like fireball-js, then compare the score.
All mobile devices have limited storage options. Therefore, it is imperative for a tester to test an app under low memory conditions. To simulate these conditions, a tester has to fill device memory using dummy files. This is very tedious and time consuming process.
Is there any app or any proper steps to overcome this situation..!!
If you're using emulator to perform test execution have variety of options to control memory availability (both RAM, internal storage and SD card) Just limit the size of the memory type you need to the application size + 5% and you'll get "low memory" environment
There are also other ways already present at Stack Overflow on how to simulate memory shortage. See links below:
How can I force memory pressure for Android debugging?
How do you simulate low memory in the Android emulator?
You can specify the VM Heap parameter when creating the AVD. However, for a real device it doesn't look like you can change the parameters.
The following shows a screenshot of the Xcode CPU Report indicating that my application (while number crunching) is maxing-out one of the CPUs:
The above shows a maximum of 400%. However the iPhone has a 2-core CPU, so I am wondering why the gauge doesn't go to 200% instead?
Furthermore, by using concurrency and splitting my number crunching across multiple threads I can max out at 400%, however my algorithm only runs twice as fast. Again, indicating that the work is divided across 2 CPU Cores.
Does anyone know why Xcode shows 400% and how this relates to the physical hardware?
If you are testing in a simulator then it shows reports on the basis of your MAC's processor that's why it is showing 400% ( for a quad-core processor).
The iPhone has only 2 cores (although some iPads have more). The Mac running the simulator apparently has four, or two plus hyper threading.
Currently I develop on an extremely powerful machine: Pentium i7, 32 GB Ram, SSD, 1 Gb 1028-bit graphics card, etc.
What I'm trying to figure out is the proper way to test my applications and web pages simulating a less powerful computer. Is there any way to simulate a slower processor, less ram, slower hard drive, and weaker graphics card? I'm not sure if I missed anything else in terms of what else to simulate...
The only thing I've figured out so far is resolution, but that was as easy as changing my monitor resolution. Though, if there is a way to simulate less resolution without needing to change my actual screen resolution as well, that'd be great.
Download Windows Virtual PC.
And test you application in it. You can customize your configuration, everything like disk storage, ram memory etc.
Good application for application developers to test in different environments.
I suppose you could create a virtual machine on your computer. You could then vary how much RAM & processing power it has access to. You could boot this machine of a USB drive if you wanted to simulate a slower drive.
I am looking for an API to monitor the tasks running on a plain iPhone (no jailbreak). Those are about:
look for CPU usage (my main concern).
look for memory usage.
look for disk usage (how many read/write)
look for network usage (how many bytes sent and received by network: 3G, Wifi, GSM).
is it possible to rely on the IOS simulator running on a Mac (or should I test my application directly on the device)?
I think I can look into the system C libraries (sigint, etc.) but I am not sure to be able to retrieve this information except for the current applications running. I know some monitor applications run on the global usage but I would like to be able to find the information process by process.
If someone can provide some links or something useful, I will start a deeper investigation then.
CPU usage can be found by looking at the code from this related question:
iOS - Get CPU usage from application
Memory usage:
Available memory for iPhone OS app
And here are a couple threads that talk about how to find out about the applications or tasks currently running:
Can we retrieve the applications currently running in iPhone and iPad
How to get information about free memory and running processes in an App Store approved app? (Yes, there is one!)
How to get the active processes running in iOS
The answers to these questions may point you in the direction you'd like to head towards.
Good luck!
The Activity Monitor should get you what you're looking for. You should be able to observe RAM, CPU, and VRAM usage for each iOS process. This is a default tool installed with xCode. Very handy.