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cycle render become extremely slow
Open, Needs Triage by DeveloperPublic

Description

System Information
Operating system: Windows-10-10.0.18362 64 Bits
Graphics card: Quadro P500/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 431.40

Blender Version
Broken: version: 2.81 (sub 14), branch: master, commit date: 2019-10-09 22:31, hash: rBf61a8a2abd07
Worked: (optional)

Short description of error
[Please fill out a short description of the error here]
the cycle render engine stop working while rendering image.
however,the cpu (i use cpu render)is still work at 100% and the fan is of the computer works loudly to discharge hot air at that time.

Exact steps for others to reproduce the error
[Please describe the exact steps needed to reproduce the issue]
[Based on the default startup or an attached .blend file (as simple as possible)]
update: cycle render engine render really slow in this scene while blender set at 350 samples and use cpu render.


way to reproduce the bug : press render after unzip this zip file.

Details

Type
Bug

Event Timeline

Brecht Van Lommel (brecht) lowered the priority of this task from Needs Triage by Developer to Needs Information from User.EditedThu, Oct 10, 3:30 PM

We require an example .blend file and exact steps to reproduce the problem, to investigate reports.

update: cycle render engine render really slow in this scene while blender set at 350 samples and use cpu render.


way to reproduce the bug : press render after unzip this zip file

star wang (starnokia) updated the task description. (Show Details)
star wang (starnokia) renamed this task from cycle render phase automatically to cycle render become extremely slow.Fri, Oct 11, 10:12 AM
star wang (starnokia) raised the priority of this task from Needs Information from User to Needs Triage by Developer.

How much RAM memory does your computer have?

i start to render this .blend file and i need more than 46 hours to end render (extimated from blender) on my older CPU 2012 workstation

mine system info: linux Blender 2.81 95f020c853d6, OpenSUSE Tumbleweed/KDE, AMD FX8350, 16GB DDR3, GTX690 2+2 GB VRam- Nvidia drivers 435.21
i test this scene on Blender 2.80 stable and i find same/similiar extimated render time, can you tell what official blender version work faster?
@star wang (starnokia) i think if you upload Help > System Info generated file and/or share your config (as CPU, memory size) should will help a lot to define this as not bug IMHO
thank you in advance for updating this report and for answers to maded questions