Displaying a large image impacts Image Editor and viewport modeling performance #77812

New Issue

Sam Van Hulle · 2020-06-12T20:54:28+02:00

Sam Van Hulle commented

2020-06-12 20:54:28 +02:00

System Information
Operating system: Windows-10-10.0.18362-SP0 64 Bits
Graphics card: GeForce RTX 2060/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 442.19

Blender Version
Broken: version: 2.83.0, branch: master, commit date: 2020-06-03 14:38, hash: 211b6c29f7
Worked: 2.80

Short description of error
Displaying a large image in the Image Editor impacts performance, mostly in the editor's UI itself, but as well in viewports with certain modeling tools.
The behaviour is not consistent, but seems to occur in spikes. In my experience it's most noticeable with 4k+ images.

Exact steps for others to reproduce the error

Load or create an image of several thousands of pixels (10K x 10K).
Zoom out until you see whole image

Play animation

The Image Editor's UI now exhibits a low frame rate and long response times.

**System Information** Operating system: Windows-10-10.0.18362-SP0 64 Bits Graphics card: GeForce RTX 2060/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 442.19 **Blender Version** Broken: version: 2.83.0, branch: master, commit date: 2020-06-03 14:38, hash: `211b6c29f7` Worked: 2.80 **Short description of error** Displaying a large image in the Image Editor impacts performance, mostly in the editor's UI itself, but as well in viewports with certain modeling tools. The behaviour is not consistent, but seems to occur in spikes. In my experience it's most noticeable with 4k+ images. **Exact steps for others to reproduce the error** - Load or create an image of several thousands of pixels (10K x 10K). - Zoom out until you see whole image # Play animation The Image Editor's UI now exhibits a low frame rate and long response times.

Sam Van Hulle commented

2020-06-12 20:54:28 +02:00

Added subscriber: @frameshift

blender-admin commented

2020-06-12 20:54:28 +02:00

#79518 was marked as duplicate of this issue

Sam Van Hulle commented

2020-06-12 22:33:32 +02:00

Just noticed that it only occurs when the image is at a zoom level of less than 100%.

Richard Antalik commented

2020-06-19 04:43:56 +02:00

Changed status from 'Needs Triage' to: 'Confirmed'

Sergey Sharybin commented

2020-06-24 12:19:50 +02:00

Added subscriber: @Sergey

Sergey Sharybin commented

2020-06-24 12:19:50 +02:00

This goes to quite technical details of how image drawing works in Blender in general: every redraw will push the entire image to the GPU. For small images it's fine, but big images saturate the bus, causing lags.

Moving to the closest to the image drawing code module.

P.S. Technically this is a known limitation of current design.

This goes to quite technical details of how image drawing works in Blender in general: every redraw will push the entire image to the GPU. For small images it's fine, but big images saturate the bus, causing lags. Moving to the closest to the image drawing code module. P.S. Technically this is a known limitation of current design.

Richard Antalik commented

2020-08-05 05:23:46 +02:00

Added subscribers: @Rawalanche, @Jeroen-Bakker

Jeroen Bakker commented

2020-09-11 16:37:39 +02:00

Changed status from 'Confirmed' to: 'Resolved'

Jeroen Bakker closed this issue

2020-09-11 16:37:39 +02:00

Jeroen Bakker self-assigned this 2020-09-11 16:37:39 +02:00

Jeroen Bakker commented

2020-09-11 16:37:39 +02:00

@frameshift, This seems to be better in latest master, IMO good enough to close this issue.

large-image-perfomance-2020-09-11_16.36.13.webm

@frameshift, This seems to be better in latest master, IMO good enough to close this issue. [large-image-perfomance-2020-09-11_16.36.13.webm](https://archive.blender.org/developer/F8865873/large-image-perfomance-2020-09-11_16.36.13.webm)

Jacob Merrill commented

2020-09-11 16:45:55 +02:00

Added subscriber: @JacobMerrill-1

Sam Van Hulle commented

2020-09-17 10:08:06 +02:00

Thanks, great work @Jeroen-Bakker !

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Displaying a large image impacts Image Editor and viewport modeling performance #77812

Play animation