Corona 13 daily builds IR/viewport slowdown

[romullus]

I did notice slowdowns when IR is running in Corona 13. Slowdowns are not in the viewport, but rather in slate material editor. When IR is running everything in SME is more sluggish - dragging nodes around, connecting node handles, almost every operation needs to be tried 2-3 times before succeeding. Not a deal breaker, but certainly adds up to quite frustrating experience. SME was never smooth in Corona, but in V13 it's even worse than usual.

[maru]

What is your CPU Romullus, and could you share a sample screen capture?

[romullus]

Ryzen 5950x

I will try to record some screen capture some time later. I will also try to go back to Corona 12, just to check if slowdown is real and not something i imagine.

[shortcirkuit]

i realise hte latest daily may not have addressed the issue of the slowdown - but wanted to confirm and let you know i installed it and its still slow.

[shortcirkuit]

Has this issue been addressed yet in the latest release?

[v.p.vlasenko]

Update from my side, 12 update 1 - still a huge slowdown in max. Even settings tooltips appear/disappear very slowly.  Other software like chrome is slow as well.

intel 7980xe, 36 threads. By default # of threads override is set to -1. Reducing this number makes things more responsible (while slowing down render), BUT even with -18 (half) 3dsmax still utilizes 90-95% CPU. At -30 it uses 80-90% at first passes dropping to 37-40 in a few seconds. At -35 (so only one thread) max uses 60-70% at the start and drops down to 17-20%.

The best setting for me so far is -6. All higher is too slow, and reducing it below 6 has no noticeable effect.

[Sepia21]

I am experiencing the same slowdowns with the most recent update (Corona 12 Update 1).

[v.p.vlasenko]

Seems like the problem exists not only with IR, but also with production render. I started rendering and even the text I'm typing right now appears with significant delay. Everything is so slow - I had 2 max opened and after I started rendering in one of them, I tried to close another. Saving the scene before closing took almost a minute instead of a few seconds. The scenes are quite simple, 30mb in size (with compression). Without rendering it takes just a few seconds to save.

[Quest]

hey what version of windows do you use?

[v.p.vlasenko]

Windows 10Pro 22H2

[danio1011]

I wonder if anyone experiencing this sluggishness has looked at their GPU VRAM usage in Task Manager?  That's when my viewport\slate\UI seems to come to a screeching halt for me lately.  Scenes that shouldn't really be maxing out VRAM still sometimes do.  Very odd.  Saying things are sluggish is an understatement, and when IR starts it can get nearly unusable.  Even in isolation mode with one object I still get 95% VRAM usage, although perhaps Max doesn't clear VRAM in isolation mode, can't say I've tested that before.

Windows 10
Max 2025
Corona 13 DB from July 30
Latest Forest Pack
RTX 2080 Ti driver 32.0.15.6094

[Aram Avetisyan]

I wonder if anyone experiencing this sluggishness has looked at their GPU VRAM usage in Task Manager?  That's when my viewport\slate\UI seems to come to a screeching halt for me lately.  Scenes that shouldn't really be maxing out VRAM still sometimes do.  Very odd.  Saying things are sluggish is an understatement, and when IR starts it can get nearly unusable.  Even in isolation mode with one object I still get 95% VRAM usage, although perhaps Max doesn't clear VRAM in isolation mode, can't say I've tested that before.

Windows 10
Max 2025
Corona 13 DB from July 30
Latest Forest Pack
RTX 2080 Ti driver 32.0.15.6094

If possible, please try with the latest stable release - Corona 12 update 1 - and let us know if you are still experiencing the sluggishness.
There is already a similar report being investigated.

[danio1011]

I wonder if anyone experiencing this sluggishness has looked at their GPU VRAM usage in Task Manager?  That's when my viewport\slate\UI seems to come to a screeching halt for me lately.  Scenes that shouldn't really be maxing out VRAM still sometimes do.  Very odd.  Saying things are sluggish is an understatement, and when IR starts it can get nearly unusable.  Even in isolation mode with one object I still get 95% VRAM usage, although perhaps Max doesn't clear VRAM in isolation mode, can't say I've tested that before.

Windows 10
Max 2025
Corona 13 DB from July 30
Latest Forest Pack
RTX 2080 Ti driver 32.0.15.6094

If possible, please try with the latest stable release - Corona 12 update 1 - and let us know if you are still experiencing the sluggishness.
There is already a similar report being investigated.

Ok will do.  For what it's worth I just downsaved the file to Max 2024 and am seeing about 3.5gb less VRAM usage which is crazy.  Same corona DB version between the two.

[Juraj]

Monitoring VRAM is good idea. I use 16+ GB VRAM GPUs but even then I still use only 1024px Viewport setting (remember CoronaBitmap uses the Environment setting, so just set 3x1024px and enjoy looking at blurry shit in viewport :- D !)

[Sepia21]

I have a really simple scene with basic materials (no textures used, only Corona basic materials), and my VRAM is almost full (7.4 GB out of a total of 8 GB is used). Even with this scene, using interactive is problematic and laggy. I have an RTX 3070, and my CPU is a Core i9 13900 with 64GB of RAM.
I never had this issue with previous Corona versions, even in much heavier files.