Many Control Buttons with custom styles (StyleBoxFlat) slowing Android exports. (Less than 15fps).

[TIBI4]

Godot version (tested in both):

• Godot_v3.2.2 stable win64.
• Godot v3.2 beta2 official win64.

OS/device including version:

• Tested on Xiaomi Mi A1 and Xiaomi Redmi 4A.
• GLES2. (GLES3 tested too).

Issue description:

• Huge perfomance issues when using StyleBoxFlat.
• (Debugging trough USB).

Image 1:
Those steps are from creating a new row (on Android).

Image 2:
Those hidden nodes are replicated in the Android phone.

Steps to reproduce:

• Add many node buttons with custom StyleBoxFlat.

Minimal reproduction project:
Test.zip

[Calinou]

Duplicate of #19943; the underlying cause is the same. As a workaround, decrease the corner detail of StyleBoxFlat or avoid using rounded corners altogether. (You could use StyleBoxTexture with pre-made nine-patch textures instead.)

[TIBI4]

@Calinou

As a workaround, decrease the corner detail of StyleBoxFlat or avoid using rounded corners altogether. (You could use StyleBoxTexture with pre-made nine-patch textures instead.)

Making pre-made textures worked for me earlier. But I wanted to use what Godot provided to me.

Anyways. I share this, as decreasing corner details, avoiding using rounded corners, or both at the same time didn't help.

(all of them above Physics Frame Time)

Minimal corner detail.

Border radius = 0.

Both at the same time.