Performance issue: Active Object (with a group) drops viewport fps #53891

New Issue

¿? · 2018-01-24T23:27:36+01:00

¿? commented

2018-01-24 23:27:36 +01:00

Windows 7 64Bit, GTX 770

40dbf2f / 5bd8ac9 (2.79 stable)

When an object is in a group, if it is the scene's active object, performance will drop.
The object can have a group and be selected without dropping fps but only if it's not in a group.

Here is a scene with two empties, and a monkey with some modifiers (to drop fps to see it)

Bug-Groups-FPS.blend

Windows 7 64Bit, GTX 770 40dbf2f / 5bd8ac9 (2.79 stable) When an object is in a group, if it is the scene's active object, performance will drop. The object can have a group and be selected without dropping fps but only if it's not in a group. Here is a scene with two empties, and a monkey with some modifiers (to drop fps to see it) [Bug-Groups-FPS.blend](https://archive.blender.org/developer/F1972731/Bug-Groups-FPS.blend)

¿? commented

2018-01-24 23:27:36 +01:00

Added subscriber: @Ebone

Philipp Oeser commented

2018-01-26 19:35:25 +01:00

Added subscriber: @lichtwerk

Philipp Oeser commented

2018-01-26 19:35:25 +01:00

Having a hard time reproducing this

tested with a totally dummy script:

import bpy
from threading import Timer

iCount = 0

def framecounter(scene):
    global iCount
    iCount += 1

bpy.app.handlers.frame_change_pre.append(framecounter)

def print_result():
    print("frames %i", iCount)

t = Timer(10.0, print_result)
t.start()

bpy.ops.screen.animation_play()

And all I get from this is very similar results, no matter which empty I have selected.

Could you try if this also happens with factory settings? (File > Load Factory Settings)

Having a hard time reproducing this tested with a totally dummy script: ``` import bpy from threading import Timer iCount = 0 def framecounter(scene): global iCount iCount += 1 bpy.app.handlers.frame_change_pre.append(framecounter) def print_result(): print("frames %i", iCount) t = Timer(10.0, print_result) t.start() bpy.ops.screen.animation_play() ``` And all I get from this is very similar results, no matter which empty I have selected. Could you try if this also happens with factory settings? (File > Load Factory Settings)

¿? commented

2018-01-26 21:21:33 +01:00

Changed status from 'Open' to: 'Archived'

¿? closed this issue

2018-01-26 21:21:33 +01:00

¿? self-assigned this 2018-01-26 21:21:33 +01:00

¿? commented

2018-01-26 21:21:33 +01:00

Weird, I don't know what that script is supposed to do.

Anyway, no, I scoured through my addons, and found that there are multiple addons more or less, contributing to the frame drop, however while most are the difference between 62fps and flickering from 58-60, the big culprit dropping it to like 30-40fps/60 is the Source Tools (Valve Importer) addon.

It has a section in it's utils.py addon, which does a check for the active object (and having a group), then does something with that data:

@persistent
def scene_update(scene, immediate=False):
	global need_export_refresh
	global last_export_refresh
	global scene_update_guard

	if bpy.context.active_object:
		scene_update_guard = True
		try:
			for group in bpy.context.active_object.users_group:
				group.vs.selected_item = group.objects.values().index(bpy.context.active_object)
		finally:
			scene_update_guard = False
		..........
	...........
..........

I don't know what it's doing but I do know that I REALLY only need the addon during "import" and whatever this is doing, it's something I really don't need or likely want.
Commenting most of that solves my big problem without breaking anything that I'm aware of.
I'm going to report it to that developer.

Weird, I don't know what that script is supposed to do. Anyway, no, I scoured through my addons, and found that there are multiple addons more or less, contributing to the frame drop, however while most are the difference between 62fps and flickering from 58-60, the big culprit dropping it to like 30-40fps/60 is the Source Tools (Valve Importer) addon. It has a section in it's utils.py addon, which does a check for the active object (and having a group), then does something with that data: ``` @persistent def scene_update(scene, immediate=False): global need_export_refresh global last_export_refresh global scene_update_guard if bpy.context.active_object: scene_update_guard = True try: for group in bpy.context.active_object.users_group: group.vs.selected_item = group.objects.values().index(bpy.context.active_object) finally: scene_update_guard = False .......... ........... .......... ``` I don't know what it's doing but I do know that I REALLY only need the addon during "import" and whatever this is doing, it's something I really don't need or likely want. Commenting most of that solves my big problem without breaking anything that I'm aware of. I'm going to report it to that developer.

Philipp Oeser commented

2018-01-26 22:04:33 +01:00

Thanx for reporting back.
(That script was just a quick hack to have animation playing for 10secs and report back how many frames actually played...)

Thanx for reporting back. (That script was just a quick hack to have animation playing for 10secs and report back how many frames actually played...)

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Performance issue: Active Object (with a group) drops viewport fps #53891