| # Pixel upscale memory |
|
|
| Upscale Loop End uses a lazy graph boundary. An internal Handoff node consumes |
| the saved scene's RAW HQ frames and optional latent, produces the existing |
| context/state outputs, and completes before Advance starts the next scene. |
| Waiting recursive nodes therefore do not pin earlier scenes' full RGB inputs |
| (or all the outputs of the Current Scene node through its state connection). |
| ComfyUI can evict those ordinary output-cache entries when needed. Existing |
| workflow wiring, trimming, audio, profiles, and final output sockets are unchanged. |
|
|
| The saver reads only delivered audio from the source checkpoint after verifying |
| its checksum; it no longer loads all source video/audio latents just to save audio. |
|
|
| This does not disable ComfyUI's output/model caches, discard intentional context |
| tails, or reduce the number of frames sampled by an external upscaler. A connected |
| optional HQ latent retains its existing carry behavior. USDU's H3 tiling is |
| spatial, so one tile still contains the full scene duration. Pair this with the |
| USDU fork's buffer cleanup and preallocated image assembly fix. |
|
|
| At 277 frames, 1920 x 1088, RGB float32, one full pixel buffer is about 6.47 GiB. |
| The improvements remove redundant storage and scheduler retention; they do not |
| promise a particular total RAM/VRAM figure for a model or workflow. |
|
|
| The CPU pixel integration test executes the actual ComfyUI recursive scheduler |
| with both disabled caching and RAM-pressure caching. Weak references verify |
| that earlier frame tensors can be freed before the next scene starts. It also |
| checks saved output, context, and unchanged source files. Run with: |
|
|
| ```sh |
| COMFYUI_PATH=/path/to/ComfyUI python tests/_upscale_pixel_unit_test.py |
| COMFYUI_PATH=/path/to/ComfyUI python tests/_upscale_chain_unit_test.py |
| ``` |
|
|
