diff --git a/comfy/samplers.py b/comfy/samplers.py
index 0b38fbd1..f88b790d 100644
--- a/comfy/samplers.py
+++ b/comfy/samplers.py
@@ -9,9 +9,58 @@ import math
 from comfy import model_base
 import comfy.utils
 
+
 def lcm(a, b): #TODO: eventually replace by math.lcm (added in python3.9)
     return abs(a*b) // math.gcd(a, b)
 
+class CONDRegular:
+    def __init__(self, cond):
+        self.cond = cond
+
+    def can_concat(self, other):
+        if self.cond.shape != other.cond.shape:
+            return False
+        return True
+
+    def concat(self, others):
+        conds = [self.cond]
+        for x in others:
+            conds.append(x.cond)
+        return torch.cat(conds)
+
+class CONDCrossAttn:
+    def __init__(self, cond):
+        self.cond = cond
+
+    def can_concat(self, other):
+        s1 = self.cond.shape
+        s2 = other.cond.shape
+        if s1 != s2:
+            if s1[0] != s2[0] or s1[2] != s2[2]: #these 2 cases should not happen
+                return False
+
+            mult_min = lcm(s1[1], s2[1])
+            diff = mult_min // min(s1[1], s2[1])
+            if diff > 4: #arbitrary limit on the padding because it's probably going to impact performance negatively if it's too much
+                return False
+        return True
+
+    def concat(self, others):
+        conds = [self.cond]
+        crossattn_max_len = self.cond.shape[1]
+        for x in others:
+            c = x.cond
+            crossattn_max_len = lcm(crossattn_max_len, c.shape[1])
+            conds.append(c)
+
+        out = []
+        for c in conds:
+            if c.shape[1] < crossattn_max_len:
+                c = c.repeat(1, crossattn_max_len // c.shape[1], 1) #padding with repeat doesn't change result
+            out.append(c)
+        return torch.cat(out)
+
+
 #The main sampling function shared by all the samplers
 #Returns predicted noise
 def sampling_function(model_function, x, timestep, uncond, cond, cond_scale, model_options={}, seed=None):
@@ -67,7 +116,7 @@ def sampling_function(model_function, x, timestep, uncond, cond, cond_scale, mod
                         mult[:,:,:,area[1] - 1 - t:area[1] - t] *= ((1.0/rr) * (t + 1))
 
             conditionning = {}
-            conditionning['c_crossattn'] = cond[0]
+            conditionning['c_crossattn'] = CONDCrossAttn(cond[0])
 
             if 'concat' in cond[1]:
                 cond_concat_in = cond[1]['concat']
@@ -76,10 +125,10 @@ def sampling_function(model_function, x, timestep, uncond, cond, cond_scale, mod
                     for x in cond_concat_in:
                         cr = x[:,:,area[2]:area[0] + area[2],area[3]:area[1] + area[3]]
                         cropped.append(cr)
-                    conditionning['c_concat'] = torch.cat(cropped, dim=1)
+                    conditionning['c_concat'] = CONDRegular(torch.cat(cropped, dim=1))
 
             if adm_cond is not None:
-                conditionning['c_adm'] = adm_cond
+                conditionning['c_adm'] = CONDRegular(adm_cond)
 
             control = None
             if 'control' in cond[1]:
@@ -105,22 +154,8 @@ def sampling_function(model_function, x, timestep, uncond, cond, cond_scale, mod
                 return True
             if c1.keys() != c2.keys():
                 return False
-            if 'c_crossattn' in c1:
-                s1 = c1['c_crossattn'].shape
-                s2 = c2['c_crossattn'].shape
-                if s1 != s2:
-                    if s1[0] != s2[0] or s1[2] != s2[2]: #these 2 cases should not happen
-                        return False
-
-                    mult_min = lcm(s1[1], s2[1])
-                    diff = mult_min // min(s1[1], s2[1])
-                    if diff > 4: #arbitrary limit on the padding because it's probably going to impact performance negatively if it's too much
-                        return False
-            if 'c_concat' in c1:
-                if c1['c_concat'].shape != c2['c_concat'].shape:
-                    return False
-            if 'c_adm' in c1:
-                if c1['c_adm'].shape != c2['c_adm'].shape:
+            for k in c1:
+                if not c1[k].can_concat(c2[k]):
                     return False
             return True
 
@@ -149,31 +184,19 @@ def sampling_function(model_function, x, timestep, uncond, cond, cond_scale, mod
             c_concat = []
             c_adm = []
             crossattn_max_len = 0
+
+            temp = {}
             for x in c_list:
-                if 'c_crossattn' in x:
-                    c = x['c_crossattn']
-                    if crossattn_max_len == 0:
-                        crossattn_max_len = c.shape[1]
-                    else:
-                        crossattn_max_len = lcm(crossattn_max_len, c.shape[1])
-                    c_crossattn.append(c)
-                if 'c_concat' in x:
-                    c_concat.append(x['c_concat'])
-                if 'c_adm' in x:
-                    c_adm.append(x['c_adm'])
+                for k in x:
+                    cur = temp.get(k, [])
+                    cur.append(x[k])
+                    temp[k] = cur
+
             out = {}
-            c_crossattn_out = []
-            for c in c_crossattn:
-                if c.shape[1] < crossattn_max_len:
-                    c = c.repeat(1, crossattn_max_len // c.shape[1], 1) #padding with repeat doesn't change result
-                c_crossattn_out.append(c)
-
-            if len(c_crossattn_out) > 0:
-                out['c_crossattn'] = torch.cat(c_crossattn_out)
-            if len(c_concat) > 0:
-                out['c_concat'] = torch.cat(c_concat)
-            if len(c_adm) > 0:
-                out['c_adm'] = torch.cat(c_adm)
+            for k in temp:
+                conds = temp[k]
+                out[k] = conds[0].concat(conds[1:])
+
             return out
 
         def calc_cond_uncond_batch(model_function, cond, uncond, x_in, timestep, max_total_area, model_options):