From: "Stephen van Vuuren" <AE-List@media-motion.tv>
To: After Effects Mail List <AE-List@media-motion.tv>
Subject: RE: [AE] Uservoice feedback website - Top post - Full Program.
 Mutli-Threaded Support
Thread-Topic: [AE] Uservoice feedback website - Top post - Full Program.
 Mutli-Threaded Support
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Date: Sat, 20 Oct 2018 15:21:29 +0000
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> Why is everyone so hung up in multi-threading?

Because every modern post app is multi-threading. Multi-threaded rendering =
is at the core of all modern app design, even crap apps on your phone.

> Is it the fastest way to render? No!

Not a great argument since render speeds depend on hardware and software no=
t "ways"

> missed that the fastest way to render most things is to use the GPU.

Fast GPU renders faster than slow CPU. A slow CPU renders faster than a slo=
w GPU. I think you are trying to argue it's more efficient but drivers, typ=
e of render (i.e. large bitmaps vs vectors) make this a very complex questi=
on.

>>The After Effects team has been hard at work laying the foundation for a =
move to GPU rendering the last few cycles.

There has been no statement from Adobe that it will move to GPU as the prim=
ary and sole rendering engine.=20

>> When everything is done on the GPU, frames can be kept in the GPU buffer=
, and AE will get a lot faster.

Do you have any evidence to back this up? My GPU accelerated plugs that all=
ow performance tuning like Neat Video NEVER run fastest on the GPU alone. I=
t's always a combination of cores and GPU that run fastest even on my 8/16 =
core/thread boxes with 128GB RAM and Quadro P6000 cards. Neat has been doin=
g GPU acceleration for much longer than AE and then still use CPU heavily f=
or fastest performance.=20

Why? Because Neat is completely multi-threaded down to be able to use CPU a=
nd GPU multiple threads at the same time. That's why everyone is hung up on=
 this.


-----Original Message-----
From: After Effects Mail List <AE-List@media-motion.tv>=20
Sent: Friday, October 19, 2018 7:04 PM
To: After Effects Mail List <AE-List@media-motion.tv>
Subject: Re: [AE] Uservoice feedback website - Top post - Full Program. Mut=
li-Threaded Support

Why is everyone so hung up in multi-threading?

Is multi-threading faster than single-threading? Yes.
Is it the fastest way to render? No!

If you have paid any amount of attention the last decade, you cannot have m=
issed that the fastest way to render most things is to use the GPU. The Aft=
er Effects team has been hard at work laying the foundation for a move to G=
PU rendering the last few cycles.

This is exactly the opposite of what some of you are accusing them of. They=
 are doing hard and important stuff that is NOT helping the marketing team =
at all. Work that we all will benefit from in future updates.

In earlier versions, we got GPU accelerated Gaussian Blur, Lumetri Color, S=
harpen, and Cartoon effects, and GPU accelerated Composition, Layer, and Fo=
otage panels. Plus GPU accelerated Brightness and Contrast, Find Edges, Glo=
w, Hue/Saturation, Invert, and Tint.=20

The latest update gave us GPU-accelerated Mocha Plug-In plus nine more GPU =
accelerated effects, including Color Balance (HLS), Curves, Fill, Exposure,=
 Noise, Tritone, and Set Matte.=20

Wave Warp and Median are now multi-threaded, BTW.

The move to GPU acceleration is going to make rendering increasingly effici=
ent. When ALL effects are calculated on the GPU, that's when we'll see the =
real benefits of this. Moving frames between the GPU and CPU and back is no=
t very effective. When everything is done on the GPU, frames can be kept in=
 the GPU buffer, and AE will get a lot faster.

I hope the AE team continues on this path - moving more and more processing=
 to the GPU. I would certainly not want them to waste time making some effe=
cts multithreaded, instead of making them GPU accelerated.

/jarle


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