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ACES 2.0 optimization
This page is to collect various results from our ongoing effort to implement the ACES 2.0 output transforms in an efficient manner.
Test config. This is a reorganized version of the most recent version of the ACES 2 draft config with ACES 1.3 viewing transforms added.
The following commands may be used with the above config to benchmark CPU performance using the ocioperf command-line tool. I propose we use the D65 sRGB Output Transform, for consistency.
export OCIO=<PATH_TO_CONFIG>
ocioperf --verbose --iter 10 --test 0 --view ACES2065-1 "sRGB - Display" "ACES 1.0 - SDR Video"
ocioperf --verbose --iter 10 --test 0 --view ACES2065-1 "sRGB - Display" "ACES 2.0 - SDR 100 nits (Rec.709)"
The ocioperf tool outputs three durations:
- the first iteration duration
- the average duration excluding the first iteration
- the overall average duration
I propose we use the second (middle) value from the result "Process the complete image (in place)", for consistency.
| Branch | Hardware | ACES2/ACES1 | ACES 2 | ACES 1 | Submitted by | Date |
|---|---|---|---|---|---|---|
| 2.4.1 | M1 Pro, ARM build clang 16 | 7.8 | 4027 ms | 515 ms | Doug | 2025-01-18 |
| 2.4.1 | M1 Pro, x86 build (Rosetta) clang 16 | 8.3 | 5935 ms | 714 ms | Doug | 2025-01-18 |
| 2.4.1 | Intel i9 MacbookPro clang 16 | 5.2 | 4760 ms | 921 ms | Remi | 2025-01-24 |
| 2025-01-22 Kevin 4eaa012 | Intel i9 MacbookPro clang 16 | 4.5 | 4111 ms | 919 ms | Remi | 2025-01-24 |
| 2.4.1 | AMD Epyc Linux gcc 11.2 | 4.2 | 3833 ms | 908 ms | Remi | 2025-01-24 |
| 2025-01-22 Kevin 4eaa012 | AMD Epyc Linux gcc 11.2 | 3.7 | 3079 ms | 822 ms | Remi | 2025-01-24 |
| 2.4.1 | Xeon E5 Windows VS 2022 | 1.8 | 8565 ms | 4704 ms | Remi | 2025-01-24 |
| 2025-01-22 Kevin 4eaa012 | Xeon E5 Windows VS 2022 | 1.5 | 7064 ms | 4717 ms | Remi | 2025-01-24 |
| 2.4.1 | M1 Ultra ARM build clang 14 | 8.0 | 4059 ms | 509 ms | Nick | 2025-01-27 |
| 2025-01-27 Kevin 874ba32 | M1 Ultra ARM build clang 14 | 6.7 | 3458 ms | 520 ms | Nick | 2025-01-27 |
| 2.4.1 | M2 Pro ARM build clang 14 | 7.9 | 3741 ms | 472 ms | Nick | 2025-01-27 |
| 2025-01-27 Kevin 874ba32 | M2 Pro ARM build clang 14 | 6.5 | 3110 ms | 477 ms | Nick | 2025-01-27 |