From 97ff9fae7e728cffdfc3aee6d72aa1e0d0b78702 Mon Sep 17 00:00:00 2001
From: comfyanonymous <121283862+comfyanonymous@users.noreply.github.com>
Date: Sun, 2 Nov 2025 10:14:04 -0800
Subject: [PATCH] Clarify help text for --fast argument (#10609)

Updated help text for the --fast argument to clarify potential risks.
---
 comfy/cli_args.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/comfy/cli_args.py b/comfy/cli_args.py
index 3d5bc7c90..3947e62a8 100644
--- a/comfy/cli_args.py
+++ b/comfy/cli_args.py
@@ -147,7 +147,7 @@ class PerformanceFeature(enum.Enum):
     AutoTune = "autotune"
     PinnedMem = "pinned_memory"
 
-parser.add_argument("--fast", nargs="*", type=PerformanceFeature, help="Enable some untested and potentially quality deteriorating optimizations. --fast with no arguments enables everything. You can pass a list specific optimizations if you only want to enable specific ones. Current valid optimizations: {}".format(" ".join(map(lambda c: c.value, PerformanceFeature))))
+parser.add_argument("--fast", nargs="*", type=PerformanceFeature, help="Enable some untested and potentially quality deteriorating optimizations. This is used to test new features so using it might crash your comfyui. --fast with no arguments enables everything. You can pass a list specific optimizations if you only want to enable specific ones. Current valid optimizations: {}".format(" ".join(map(lambda c: c.value, PerformanceFeature))))
 
 parser.add_argument("--mmap-torch-files", action="store_true", help="Use mmap when loading ckpt/pt files.")
 parser.add_argument("--disable-mmap", action="store_true", help="Don't use mmap when loading safetensors.")