Very slow http download speeds on Android

[slasktotten]

Godot version:
3.3.2
Mac OS X (11.3)

OS/device including version:
Android 10 - Nokia 4.2
Android 7 - Samsung Galaxy S6

Issue description:
After updating our project from 3.2.2 -> 3.3.2 http download speeds have been incredible slow on Android using HTTPClient. Downloading a 50mb file has gone from taking roughly 10sec to 5-10min.
This issue only appears on Android. Iphone, Windows and OS X are working as expected.

[Chaosus]

cc @Faless

[Faless]

I'll have a look, did you set use_threads = true? If yes, could you try disabling it? Maybe related to the old #33479 and the threading changes in 3.3? Sounds weird that it only happens on Android.

[slasktotten]

We are not using use_threads. However we have wrapped our call in a thread. If I naively move the code out of the thread, downloading becomes incredible slow across all devices (editor included).
It is worth mentioning that our Android devices are lower-end while the iphones are much more powerful (however this has not been an issue in the past).

If it somehow was related to threading it might explain why 3.3.2 has overall been performing quite a bit worse (much longer startup, lower framerate in our 3d world) on our Android devices then 3.2.2.

[slasktotten]

I managed to test on an HONOR 20 (fairly high end device) running Android 10 and on there everything ran as expected.

[dpensky]

It still happens. Downloading from iOS version or even the HTML5 version of my game the speeds are much higher.
I'm using this code:

download_destination = "user://" + filename
download_request = HTTPRequest.new()
add_child(download_request)
download_request.download_file = download_destination
download_request.connect("request_completed", self, "_http_request_completed")
var error = download_request.request(download_url)

and tracking progress with:

var body = download_request.get_body_size()
var downloaded = download_request.get_downloaded_bytes()

My test device is a Samsung A02S with Android 12
File is about 20Mb, hosted on a AWS machine.

[Calinou]

@dpensky Which Godot version are you using?

[dpensky]

@dpensky Which Godot version are you using?

I'm using Godot 3.5.1
File sizes range between 9 and 23 Mb

[dpensky]

In my case, I realized that the problem only occurs when I'm using WIFI and not occurs when using the 4G network.
However, downloading files through the browser, for example, I do not notice this problem, quite the contrary, in general it is much faster to download through WIFI.