Hi,
I noticed a severe difference in pre-render times for viewport rendering between different blender versions, see table and system specs below. All tested with The Junk shop demo scene, timed via phone stop watch so I guesstimate the marginal of error is around 0.5s (still well below the resulting differences).
The Junk Shop pre render times
| 2.81a init | 2.81a tot | 2.82a init | 2.82a tot | 2.83 init | 2.83 tot | 2.90.0 init | 2.90.0 tot (9f7d84b656fb) | |
|---|---|---|---|---|---|---|---|---|
| CUDA CPU | 7.8s | 25.3s | 7.8s | 13.9s | 18.0s | 23.1s | 18.1s | 23.3s |
| CUDA GPU (CPU+RTX) | 8.0s | 25.3s | 8.2s | 13.9s | 18.6s | 23.0s | 18.1s | 22.8s |
| CUDA GPU (Only RTX) | 8.0s | 13.9s | 7.8s | 13.7s | 18.1s | 23.0s | 18.2s | 22.9s |
| Optix | 8.0s | 10.7s | 7.8s | 10.5s | 18.3s | 19.6s | 18.5s | 19.5s |
My specs are:
OS: Win 10
CPU: Ryzen 7
Graphics card: ROG STRIX RTX 2070 OC 8GB
Graphics driver: 442.92 (Latest studio driver afaik)
- Is there any known difference in blender that should cause this differences?
- Is there any setting or similar I should check for that could cause this?
Any possible help is very much appreciated! Cheers 