From fd0261d2bc0c32fa6c21d20994702f44fd927d4c Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Jukka=20Sepp=C3=A4nen?= <40791699+kijai@users.noreply.github.com> Date: Thu, 19 Mar 2026 19:29:34 +0200 Subject: [PATCH] Reduce tiled decode peak memory (#13050) --- comfy/utils.py | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/comfy/utils.py b/comfy/utils.py index 13b7ca6c8..78c491b98 100644 --- a/comfy/utils.py +++ b/comfy/utils.py @@ -1135,8 +1135,8 @@ def tiled_scale_multidim(samples, function, tile=(64, 64), overlap=8, upscale_am pbar.update(1) continue - out = torch.zeros([s.shape[0], out_channels] + mult_list_upscale(s.shape[2:]), device=output_device) - out_div = torch.zeros([s.shape[0], out_channels] + mult_list_upscale(s.shape[2:]), device=output_device) + out = output[b:b+1].zero_() + out_div = torch.zeros([s.shape[0], 1] + mult_list_upscale(s.shape[2:]), device=output_device) positions = [range(0, s.shape[d+2] - overlap[d], tile[d] - overlap[d]) if s.shape[d+2] > tile[d] else [0] for d in range(dims)] @@ -1151,7 +1151,7 @@ def tiled_scale_multidim(samples, function, tile=(64, 64), overlap=8, upscale_am upscaled.append(round(get_pos(d, pos))) ps = function(s_in).to(output_device) - mask = torch.ones_like(ps) + mask = torch.ones([1, 1] + list(ps.shape[2:]), device=output_device) for d in range(2, dims + 2): feather = round(get_scale(d - 2, overlap[d - 2])) @@ -1174,7 +1174,7 @@ def tiled_scale_multidim(samples, function, tile=(64, 64), overlap=8, upscale_am if pbar is not None: pbar.update(1) - output[b:b+1] = out/out_div + out.div_(out_div) return output def tiled_scale(samples, function, tile_x=64, tile_y=64, overlap = 8, upscale_amount = 4, out_channels = 3, output_device="cpu", pbar = None):