[WIP] Break down JxlDecoder to better support streaming, preview, animation, etc.
#427
| Job | Run time |
|---|---|
| 2m 44s | |
| 3m 47s | |
| 2m 32s | |
| 13s | |
| 2m 23s | |
| 2m 17s | |
| 1m 59s | |
| 2m 2s | |
| 2m 21s | |
| 20m 18s |