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--fast now takes a number as argument to indicate how fast you want it.

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The idea is that you can indicate how much quality vs speed you want.

At the moment:

--fast 2 enables fp16 accumulation if your pytorch supports it.
--fast 5 enables fp8 matrix mult on fp8 models and the optimization above.

--fast without a number enables all optimizations.
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comfyanonymous
2025-02-28 02:48:20 -05:00
parent eb4543474b
commit cf0b549d48
3 changed files with 4 additions and 3 deletions
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comfy/cli_args.py
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@@ -130,7 +130,7 @@ parser.add_argument("--default-hashing-function", type=str, choices=['md5', 'sha
parser.add_argument("--disable-smart-memory", action="store_true", help="Force ComfyUI to agressively offload to regular ram instead of keeping models in vram when it can.")
parser.add_argument("--deterministic", action="store_true", help="Make pytorch use slower deterministic algorithms when it can. Note that this might not make images deterministic in all cases.")
parser.add_argument("--fast", action="store_true", help="Enable some untested and potentially quality deteriorating optimizations.")
parser.add_argument("--fast", metavar="number", type=int, const=99, default=0, nargs="?", help="Enable some untested and potentially quality deteriorating optimizations. You can pass a number from 0 to 10 for a bigger speed vs quality tradeoff. Using --fast with no number means maximum speed. 2 or larger enables fp16 accumulation, 5 or larger enables fp8 matrix multiplication.")
parser.add_argument("--dont-print-server", action="store_true", help="Don't print server output.")
parser.add_argument("--quick-test-for-ci", action="store_true", help="Quick test for CI.")