Repeated hiding and unhiding of objects causes more memory usage #59525

New Issue

Sam Van Hulle · 2018-12-18T01:42:26+01:00

Sam Van Hulle commented

2018-12-18 01:42:26 +01:00

System Information
Operating system: Windows
Graphics card: GTX 960

Blender Version
Broken: 2.80 9149e894210

Short description of error
Repeated hiding and unhiding of objects causes Blender's total memory usage to rise. Higher numbers of objects (presumably also polycounts) have a larger impact.

Exact steps for others to reproduce the error
Repeatedly hide and unhide any number of objects in the viewport - I used the eye icon in the Outliner.

**System Information** Operating system: Windows Graphics card: GTX 960 **Blender Version** Broken: 2.80 `9149e894210` **Short description of error** Repeated hiding and unhiding of objects causes Blender's total memory usage to rise. Higher numbers of objects (presumably also polycounts) have a larger impact. **Exact steps for others to reproduce the error** Repeatedly hide and unhide any number of objects in the viewport - I used the eye icon in the Outliner.

Sam Van Hulle commented

2018-12-18 01:42:26 +01:00

Added subscriber: @frameshift

Campbell Barton commented

2018-12-18 02:13:08 +01:00

Added subscriber: @ideasman42

Campbell Barton commented

2018-12-18 02:13:08 +01:00

This adds undo steps which use memory, unless the memory usage increased significantly since 2.7x it's not a bug.

Sam Van Hulle commented

2018-12-18 11:32:57 +01:00

Fair enough, makes sense.
Is it normal though for undo steps to take up more memory when the complexity of said objects increases? Even if the datablocks are linked from another library?
A cube, for example, adds kilobytes. A forest of linked trees adds tens of megabytes each time.

Fair enough, makes sense. Is it normal though for undo steps to take up more memory when the complexity of said objects increases? Even if the datablocks are linked from another library? A cube, for example, adds kilobytes. A forest of linked trees adds tens of megabytes each time.

Sebastian Parborg commented

2018-12-19 12:34:34 +01:00

Added subscriber: @ZedDB

Sebastian Parborg commented

2018-12-19 12:34:34 +01:00

IIRC, the undo system save snapshots of the scene data (not diffs). So the more complex objects will add more to memory, yes.

Campbell Barton commented

2018-12-19 23:55:09 +01:00

Changed status from 'Open' to: 'Archived'

Campbell Barton closed this issue

2018-12-19 23:55:09 +01:00

Campbell Barton self-assigned this 2018-12-19 23:55:09 +01:00

Campbell Barton commented

2018-12-19 23:55:09 +01:00

Right, there are snapshots but only changed chunks of memory are stored.

Did a quick comparison and it seems this isn't working especially differently in 2.8x compared to 2.7x. Closing.

@frameshift - if you can show an example where this is significantly worse in 2.8x compared to 2.79 release. Open a new report with sample file.

Right, there are snapshots but only changed chunks of memory are stored. Did a quick comparison and it seems this isn't working especially differently in 2.8x compared to 2.7x. Closing. @frameshift - if you can show an example where this is significantly worse in 2.8x compared to 2.79 release. Open a new report with sample file.

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