Merge 76b7c71b6e into ff838657fa

Use non-alias
Use torch.special.expm1
2025-01-11 02:15:17 +00:00 · 2025-01-09 20:13:10 +08:00 · 2025-01-07 15:51:19 -08:00 · 2025-01-07 15:39:37 -08:00
1 changed files with 1 additions and 1 deletions
--- a/comfy/k_diffusion/sampling.py
+++ b/comfy/k_diffusion/sampling.py
@ -40,7 +40,7 @@ def get_sigmas_polyexponential(n, sigma_min, sigma_max, rho=1., device='cpu'):
 def get_sigmas_vp(n, beta_d=19.9, beta_min=0.1, eps_s=1e-3, device='cpu'):
    """Constructs a continuous VP noise schedule."""
    t = torch.linspace(1, eps_s, n, device=device)
-    sigmas = torch.sqrt(torch.exp(beta_d * t ** 2 / 2 + beta_min * t) - 1)
+    sigmas = torch.sqrt(torch.special.expm1(beta_d * t ** 2 / 2 + beta_min * t))
    return append_zero(sigmas)
Author	SHA1	Message	Date
Sergii Dymchenko	a2fc55e467	Merge `76b7c71b6e` into `ff838657fa`	2025-01-09 20:13:10 +08:00
Sergii Dymchenko	76b7c71b6e	Use non-alias	2025-01-07 15:51:19 -08:00
Sergii Dymchenko	e4e2d82b0f	Use `torch.special.expm1` This function provides greater precision than `exp(x) - 1` for small values of `x`. Found with TorchFix https://github.com/pytorch-labs/torchfix/	2025-01-07 15:39:37 -08:00