Why is Fusion so slow

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James Spatz

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Why is Fusion so slow

PostThu Jun 20, 2019 2:27 pm

I had been using Fusion for drop shadows on PNGs and the delta keyer. On version 15 I was get in the range of 5fps. on 16 it has dropped to .5-1fps. Any Ideas?
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Jean Claude

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Re: Why is Fusion so slow

PostThu Jun 20, 2019 5:43 pm

James Spatz wrote:I had been using Fusion for drop shadows on PNGs and the delta keyer. On version 15 I was get in the range of 5fps. on 16 it has dropped to .5-1fps. Any Ideas?
Thanks
Windows 10 Pro
Alienware 15 r3
32GB ram
Gtx1070
SSD raid 0


When I had 2xGTX1070 with 32 GB RAM it was the speeds that I noticed with certain effect. Fusion is very resource hungry :?
"Saying it is good, but doing it is better! "
Win10-1809 | Resolve Studio V16.1 | Fusion Studio V16.1 | Decklink 4K Extreme 6G | RTX 2080Ti 431.86 NSD driver! |
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Sander de Regt

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Re: Why is Fusion so slow

PostThu Jun 20, 2019 8:18 pm

Fusion is very resource hungry

The Fusion-page perhaps, but Fusion has always been one of the most memory efficient pieces of software I used to work with. I even did 2K VFX shots for feature films on a Dual 1Ghz with 4 Gb of ram without it crashing, way back in 2007 or so. Fusion standalone has become quicker in version 16, so my guess is that there's something else that's causing this. Also, as soon as you start adjusting the Delta Keyer it gets slower quick.
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Rick van den Berg

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Re: Why is Fusion so slow

PostFri Jun 21, 2019 3:41 pm

for some reason, fusion (standalone as well as in resolve) has always been slow/not so reliable for me. still cannot figure out why.

i hope one day most of the effects in fusion will be as quick as those in the color page. it's lightning fast over there. i try to stay away from fusion as much as possible, due to all the potential stress it can give.

if i want to pull a key/animate 2d stuff/do some effects, my heart is telling me fusion, but mister deadline on my shoulders says colortab/after effects. i still keep using both though, because its fun.

some day soon..
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Harold Tomlinson

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Re: Why is Fusion so slow

PostFri Jun 21, 2019 4:25 pm

Rick. Would you say that fusion studio is any faster than fusion in Resolve? I am only getting 5fps with some simple text nodes in Resolve and am considering buying Fusion studio to see if it can be faster. Do you think it is?
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Oyvind Fiksdal

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Re: Why is Fusion so slow

PostFri Jun 21, 2019 4:37 pm

Fusion stand alone is faster from my experience. You also feel a bit cage with the resolve version for some reason… hard to explain.
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Jean Claude

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Re: Why is Fusion so slow

PostFri Jun 21, 2019 5:09 pm

Harold Tomlinson wrote:Rick. Would you say that fusion studio is any faster than fusion in Resolve? I am only getting 5fps with some simple text nodes in Resolve and am considering buying Fusion studio to see if it can be faster. Do you think it is?


(test done very quickly)

Hello Harold,

with your system, you must be able to get better results.
DR16b4 - iMac Pro 2017 - 2.3GHz 18 Core 64GB
- Radeon Pro Vega 64 16GB + Radeon VII 16GB

I tried without cache with a BRAW in Fusion TAB and I get RT in reading.
Fusion_Tab_RT.jpg



In EDIT Tab, I have RT read with a Title+ 3D Text and the result of Fusion TAB.
Edit_Tab_RT.jpg


Do you have the right drivers?

(OK I do not have the same GPU but you have a Radeon VII) :)
"Saying it is good, but doing it is better! "
Win10-1809 | Resolve Studio V16.1 | Fusion Studio V16.1 | Decklink 4K Extreme 6G | RTX 2080Ti 431.86 NSD driver! |
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Trensharo

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Re: Why is Fusion so slow

PostSat Jun 22, 2019 1:27 am

Harold Tomlinson wrote:Rick. Would you say that fusion studio is any faster than fusion in Resolve? I am only getting 5fps with some simple text nodes in Resolve and am considering buying Fusion studio to see if it can be faster. Do you think it is?
Fusion 9 standalone is faster than the page in R16 on my machine, for sure.

I am not sure if that has changed in F16 Studio.

Feels like you have to throw way more specs at the Resolve page to get comparable performance.

Sent from my SM-N960U using Tapatalk
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Pyrate

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Re: Why is Fusion so slow

PostSat Jun 22, 2019 1:57 am

As a big fan of resolve, (dumped adobe all together for it) not a fan of fusion.
I tend to use blender for vfx, just because of performance and results. Its just easier and more efficient to do effects in Blender.
I tried to love fusion, but its just painful to use
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Harold Tomlinson

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Re: Why is Fusion so slow

PostSat Jun 22, 2019 4:11 am

So I decided that I have spent too much time thinking about and researching the performance of Fusion Studio versus Fusion in Resolve. More time than the application costs. So I bought a Fusion Studio 9 dongle today.

Oh, Jean, thanks for doing the test. I don't know about drivers, as the old ad said "I'm a Mac". (Sorry, had to do it.)

I took the timeline that I need the Fusion for, removed the Fusion composition, and created a new timeline with a new composition. With only the Media In and Media Out nodes, Resolve was rendering at 20fps. Ugh.

After installing the Fusion Studio 16 and using "New VFX Composite Clip" in Resolve, the empty Fusion composition (with in and out nodes) renders at full speed.

The most amazing thing is that I was able to go to the composition I had in Resolve with the 9 Text nodes, a couple of Blurs, and the requisite merges, select them all and copy with Command-C. Then in Fusion Studio, I just did a paste (Command-V) and voila.

Initially it rendered at 8fps, but soon cached and ran at full speed. With changes it does go back to 8 or 9 fps so I hope to make it faster. I will need to experiment with settings that can make this faster and perhaps add Render nodes on other hosts or VMs.

It does not seem to use the GPUs and it seldom gets the CPU over 30%.
---
DR16.1b1/Fusion Studio 16
iMac Pro 2017 - 2.3GHz 18 Core 64GB
- Radeon Pro Vega 64 16GB + Radeon VII 16GB
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Steve Alexander

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Re: Why is Fusion so slow

PostSat Jun 22, 2019 10:09 am

Harold - your last statement interests me as I have observed the same - slow performance but neither GPU nor CPU are fully taxed. I would think to look for other bottlenecks such as the storage pipeline but that didn't seem to be the case either. I'll have to go back and do some more testing some day.
Resolve Studio 16.1b3 | Fusion Studio 16.1b3 | Win 10 Pro (1903) | i9-7940x, P4000 (431.86, 8GB VRAM), 64GB RAM, M.2 boot, SSD scratch, RAID10 data | (laptop) i7-6600, M1000M (2GB VRAM), 32GB RAM, SSD OS, M.2 scratch, T3 external
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Harold Tomlinson

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Re: Why is Fusion so slow

PostSat Jun 22, 2019 6:49 pm

I don't think it is my storage. Blackmagic Design Disk Speed Test reports 2.4GB/s read on my boot disk and 1.2 GB/s on my media drive.

I did notice in Studio that I have options about the GPU; Auto, Disable, or Enable. It does not seem to matter which combination of these I use, it is slow to do a simple scrolling text (4fps). It seems faster than doing it in Resolve and, when I return to Resolve the animation is rendered so it does not slow down my playback when I am working on other things. So far I think having Studio will make things a bit faster, but not much. Once I get a few render nodes running, though, hopefully I can be running at full speed.
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---
DR16.1b1/Fusion Studio 16
iMac Pro 2017 - 2.3GHz 18 Core 64GB
- Radeon Pro Vega 64 16GB + Radeon VII 16GB
BMPCC6k - BMPCC4k - GH5s - GH4 - GoPro Hero 7 Black
vimeo.com/haroldtomlinson
creacom.smugmug.com
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ghobbs

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Re: Why is Fusion so slow

PostMon Jul 15, 2019 3:34 pm

The Fusion page in Resolve doesn't seem to support simultaneous branching, which can significantly impact performance in some cases. I imagine that there's some complexity in getting this to work well inside Resolve, and the case could be made that it is less important than it used to be as some nodes are making better use of the GPU.

What I don't understand is why the Fusion page in Resolve will not seem to play cached frames at 24fps. This makes it very difficult to preview what an animation will look like without jumping into the edit page and waiting an unspecified amount of time for the render to complete. I wonder if it has to do with the way my system is configured. Who else has experienced / found a solution to this problem?

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