topic Re: Fusion 360 very slow performance and freezes in Fusion Support Forum

Fusion 360 very slow performance and freezes

rapidmove — Sun, 22 Jun 2025 14:31:18 GMT

Hi,

I am using Fusion 360 [Fusion 2602.1.25 x86_64] under Win11 24H2. Since the installation I encountered incredible bad performance. Application takes ages to start, any procedure takes way to loong and regually freezes.

The Hardware-system is a HP Z-Book Mobile Workstation, with i9, 64 GB RAM and a Nvidia RTX A4000.

Other 3D Applications (such as Adobe, Unreal, Ventuz etc.) run flawless on this Workstation.

I have tried all “troubleshooting” tips from Autodesk such as, updating GPU Driver, deleting Cache, disabling (temporally) Antivirus, Repair, clean uninstall and reinstall. All without any change in performance.

Anybody encountered similar performance issues as I have?

Thank you in advance

Re: Fusion 360 very slow performance and freezes

Magnus.BimexSweden — Tue, 24 Jun 2025 13:46:10 GMT

Yeah i''ve noticed it on our PC's to we have 4 that have started glitching and just general stability-problems since last update.

Re: Fusion 360 very slow performance and freezes

jakeTNMWG — Wed, 25 Jun 2025 13:44:22 GMT

The last few updates broke a lot of stuff for me. Im pretty disappointed with everything and its messing with my work flow.

Re: Fusion 360 very slow performance and freezes

TrippyLighting — Thu, 26 Jun 2025 21:37:03 GMT

Folks, without actual models or examples that can be reproduced, your posts are pointless.

If you can post reproducible examples and screencasts, I'd be happy to tag an AD Quality engineer.

Re: Fusion 360 very slow performance and freezes

rapidmove — Fri, 27 Jun 2025 08:17:10 GMT

Hi,

As mentioned, the application's clean start-up, even without any project, takes ages. I just clocked it, and Fusion needs around 4:30 - 6 minutes to start up.

When I open a simple STP Model and switch only from construction to render, it takes between 2-3 minutes only for the switch. Fusion is not even responding during that time.

I do get "Performance Errors" after the switch to render, but the hardware I use is powerful enough. It also works flawlessly with other GPU-intensive 3D applications.

Here is a typical example of what I am facing permanently.

(view in My Videos)

Re: Fusion 360 very slow performance and freezes

TrippyLighting — Fri, 27 Jun 2025 10:46:48 GMT

Thanks for sharing the video. That looks indeed terribly slow!

On my home machine (Ryzen 5950, 64GB of memory, RTX 3070ti) it takes 50 seconds to start. I would consider that slow!
A larger assembly model with over 4000 components takes about 20 seconds to open, and switching that model into the render environment is almost immediate.

I've seen lags of maybe 2-3 seconds when switching into Render mode in other models, but that is rare.

My work computer (At least five a 5-year-old Dell Precision 7750 laptop with an NVIDIA Quadro 2000 graphics card) is somewhat slower but still not even close to what you show in the video. My 2017 MacBook Pro is also about 10-15% slower than the Dell laptop.

In other words, your experience is not the norm. I am going to tag an AD employee to help out. @lance.carocci

Re: Fusion 360 very slow performance and freezes

lance.carocci — Mon, 30 Jun 2025 19:41:14 GMT

@rapidmove please utilize the in-built performance recorder to submit a performance issue report.

Just looking at the video, I am curious how complex each model is within your assembly - depending on how the assembly was made, Fusion might be getting bogged down calculating or reloading parametric data. The performance report will capture some details for our team to help diagnose this.

Re: Fusion 360 very slow performance and freezes

rapidmove — Mon, 30 Jun 2025 20:00:38 GMT

Hi Lance,

thank you for the feedback. I submitted the feedback and used the same workflow as shown in the video. I guess this is the case ID: 105620

Independent from the shown bad performance when switching from construction to render, which takes no matter how complex or simple the STEP file is at least 2-3 minutes and in the time between the switch, the application is sometimes not responding.

Even a simple STEP file leads to the problem. I can share one of the step files, but of course not in this forum.

Thank you for teh support.

Martin

Re: Fusion 360 very slow performance and freezes

LishuangLu — Tue, 01 Jul 2025 00:19:17 GMT

Thank you for reporting and submitting the performance report, @rapidmove !

Could you please also help extract Fusion log and share with us for investigation? That will be much helpful to us for confirm what is causing the startup slowness.

Thanks,

Lisa

Re: Fusion 360 very slow performance and freezes

rapidmove — Tue, 01 Jul 2025 05:11:21 GMT

Hi Lisa,

Thank you for the follow up.

Could you please help me, how to activate and extract the start up log? How shall I share it?

Thank you

Martin

Re: Fusion 360 very slow performance and freezes

LishuangLu — Tue, 01 Jul 2025 05:22:59 GMT

Hi Martin,

You can extract the Fusion logs from Help-> Support and Diagnostics-> Diagnostics Log Files, the Log files will be compressed into a .zip file, please upload and share with us here.

Thanks for the support!

Regards,

Lisa

Re: Fusion 360 very slow performance and freezes

rapidmove — Tue, 01 Jul 2025 10:57:36 GMT

Hi Lisa,

Alright, clear. Please see the attached Zip file. If you need anything else, just let me know.

Martin

Re: Fusion 360 very slow performance and freezes

LishuangLu — Thu, 03 Jul 2025 06:56:30 GMT

Thank you Martin for sharing your log file with us!

We'll review the logs and investigate further. We'll keep you updated as soon as we have more findings.

Thanks,

Lisa

Re: Fusion 360 very slow performance and freezes

rapidmove — Fri, 18 Jul 2025 11:11:45 GMT

Hi,

I am wondering if there is any progress in the investigation?

Thanks,

Martin

Re: Fusion 360 very slow performance and freezes

LishuangLu — Sun, 20 Jul 2025 21:50:43 GMT

Hi Martin,

Thanks for checking!

The problem has been already tracked internally via FUS-207282, which has been in discussion on how to investigate since it was not reproducible internally.

We’ll get back to you as soon as we have any findings to share.

Regards,
Lisa

Re: Fusion 360 very slow performance and freezes

LishuangLu — Tue, 29 Jul 2025 04:33:39 GMT

@rapidmove Hi Martin,

Our team has analyzed your performance report and found that the slowness is mostly caused by a third-party software 0patch Agent (0patchLoaderX64.dll).

We recommend disabling this application on your end and giving it another try. Please let us know if this resolves the issue or if further assistance is needed.
Thank you for your support as always!

Regards,

Lisa

Re: Fusion 360 very slow performance and freezes

rapidmove — Tue, 29 Jul 2025 07:29:01 GMT

Hi Lisa,

Thank you for the feedback. I have now tested Fusion, after the (at least temporary) removal of the Tool. Indeed, it significantly increased the performance with Fusion. That is a great help. Although I am currently in a dispute with our IT department, the 0Patch - MicroPatcher is mandatory on all workstations here.

The IT department will reach out to Acros. The guys asked me if there is any report/reference/contact available for the issue that could be included for the ticket at Acros.

Thank you for the support.

regards

Martin

Re: Fusion 360 very slow performance and freezes

LishuangLu — Tue, 29 Jul 2025 17:26:22 GMT

Thank you Martin for your quick feedback!

And good to know the workaround works in your side. Yes, we will create an article to document the problem and workaround. I will let you know when the link is ready to share with you.

Thanks,

Lisa

Re: Fusion 360 very slow performance and freezes

LishuangLu — Thu, 31 Jul 2025 23:58:03 GMT

Hi Martin,

Here is the article Fusion Startup and Performance Degradation Related to 0Patch.

Let us know if you have any other questions.

Thanks,

Lisa

Re: Fusion 360 very slow performance and freezes

rapidmove — Fri, 01 Aug 2025 10:47:49 GMT

Hi Lisa,

thank you. We will add this to the Ticket.

regards

Martin