I just upgraded to an AMD Ryzen 9 3950X. It's faaaast.
The funny thing about perf in Paint.NET is that a faster CPU can actually result in a lower framerate.
Hear me out ...
The funny thing about perf in Paint.NET is that a faster CPU can actually result in a lower framerate.
Hear me out ...
A faster CPU can render more 128x128 px tiles per frame (~16ms usually).
More tiles per frame means more CPU time spent on Direct2D, copying bitmaps to the GPU, etc.
More tiles per frame means more CPU time spent on Direct2D, copying bitmaps to the GPU, etc.
So while _throughput_ (pixels per second) can go way up, _latency_ (frames per second) can drop.
I'm still trying to find a better solution for this so that faster CPU always = faster framerate :) It's a low-priority investigation though.
I'm still trying to find a better solution for this so that faster CPU always = faster framerate :) It's a low-priority investigation though.
The reason this happens is that all tiles that have finished rendering (by the CPU) are ready for drawing and are immediately copied to the GPU.
A CPU with more cores and more GHz will end up flooding the GPU, in other words.
A CPU with more cores and more GHz will end up flooding the GPU, in other words.
I've casually experimented with limiting CPU->GPU copying to a fixed # of milliseconds before each Render() call. I haven't had much success.
A more serious investigation is in order ...
A more serious investigation is in order ...
The outgoing CPU is an Intel Core i9-7900X with a 4.5GHz all-core overclock, btw. Not a slouch.
The Ryzen is still way better. No contest. Even though I'm just using a crappy air cooler (stock 3800X HSF) until the Corsair H150i (360mm AIO) arrives in the mail.
The Ryzen is still way better. No contest. Even though I'm just using a crappy air cooler (stock 3800X HSF) until the Corsair H150i (360mm AIO) arrives in the mail.
