Mobile/android questions

[soulgalore]

Your question

Hey @soulgalore could you help me understand the mobile emulation part on sitespeed.

I have read the documentation for mobile emulation. Referred links are as follows

https://www.sitespeed.io/documentation/sitespeed.io/mobile-phones/
https://www.sitespeed.io/documentation/sitespeed.io/mobile-phones/#test-on-emulated-mobile
https://www.sitespeed.io/documentation/sitespeed.io/cpu-benchmark/
https://www.sitespeed.io/documentation/sitespeed.io/configuration/
So below are my questions regarding it

Android

When I run sitespeed.io --android https://www.sitespeed.io do I need to have Android real device as documentation asks to enable developer mode after installing apt-get install android-tools-adb .Reference link

Mobile

I was able to use --mobile for testing the website on default device that is Moto G4 but I was not able to understand how to pass width/height. Also can I select any other mobile device using this option?

--browsertime.chrome.mobileEmulation.deviceName

This allowed me to select another mobile device which is great but then whats the difference between --mobile and --browsertime.chrome.mobileEmulation.deviceName argument. Like which argument has what benefits? Is it CPU throttling

Also one followup question is why the --android argument asks for developer mode but the other arguments work without it.
Is it because --android option allows us to test it on real device?

[soulgalore]

--android

Yes that is the switch to use a real Android mobile phone/tablet. The documentation for that is: https://www.sitespeed.io/documentation/sitespeed.io/mobile-phones/#test-on-android

--mobile
The name is confusing because it was added before we had the possibility to run on real devices. It really means "run a desktop browser and emulate it as a mobile browser".

I was able to use --mobile for testing the website on default device that is Moto G4 but I was not able to understand how to pass width/height. Also can I select any other mobile device using this option?

If you one of these for emulated, the width and height should be set automatically: https://github.com/sitespeedio/browsertime/blob/main/lib/support/getViewPort.js#L10-L36

--mobile and --browsertime.chrome.mobileEmulation.deviceName argument.

--mobile just takes the default one (Moto G4). Setting another device name will give another user agent and width/height. For CPU throttling you need to specify that yourself.

[Domanicfaf]

Ohh thanks for creating another issue and helping me on this 🙏. Now I get it.
Will remember to not hijack another issue next time 💯 😊