Texture import freezes

[UgisBrekis]

Operating system or device - Godot version:
Windows 10, be31151

Issue description:

I copied 2048x2048 textures into project folder and the editor simply freezes while importing the asset. Console prints this:
to gen mipmaps w 2048 h 2048 format RGBA8 mipmaps 11 new size is: 22369620

Steps to reproduce:

Link to minimal example project:

[suptoasty]

This issue also affects Manjaro Linux 64-bit with 1024x1024 textures.
Same error code as UgisBrekis

[Gibbz]

REIMPORTING: res://Map/Australia/Australia-Height.png
REIMPORTING: res://Map/Australia/Australia-Normal.png
to gen mipmaps w 1024 h 1024 format RGBA8 mipmaps 10 new size is: 5592404

yep same issue here, but not with all textures....

[ghost]

Assuming that this is caused by etc2comp, we may need to tone down the default quality setting for lossy import. I guess the alternative is to move import stuff to a separate thread.