[bug]: Performance issue - bounding box in Canvas defaults to full image size dimensions

[mcbexx]

Is there an existing issue for this problem?

• [X] I have searched the existing issues

Operating system

Windows

GPU vendor

Nvidia (CUDA)

GPU model

RTX 2070S

GPU VRAM

8

Version number

4.0.4

Browser

Firefox 124.0.2

Python dependencies

No response

What happened

I noticed that with version 4.x, the initial size of bounding box on the Unified Canvas defaults to the dimensions of the image that is brought into canvas mode.

While this can be adjusted manually, it appears that this has a negative impact on the performance and responsiveness of the GUI. If I forget to immediately adjust the bounding box size, I am experiencing constant stutters in cursor movement, jitters when using the brush tool (either in mask or paint mode).

This becomes more apparent depending on the size of the image loaded into the canvas, e.g. if you use the canvas to inpaint details into already upscaled images (which I assume is a fairly common use case).

Again, this can be fixed by manually reducing the bounding box size, but if you're not familiar with the problem, one might easily assume the GUI is laggy by default.

For reference, I am using a 3900x CPU (12/24) cores, RTX 2070 Super w/ 8GB VRAM and 32 GB RAM.

What you expected to happen

In earlier versions, the bounding box had a default initial size (512x512 I believe?) that did not match the size of the image loaded into the canvas and the stutters did not occur.

How to reproduce the problem

No response

Additional context

No response

Discord username

No response

[psychedelicious]

There's a checkbox for this in the canvas settings popover. It was changed in a recent update.