Lora cache in memory

extensions-builtin/Lora/networks.py

@@ -195,6 +195,15 @@ def load_network(name, network_on_disk):
     return net
 
 
+def purge_networks_from_memory():
+    while len(networks_in_memory) > shared.opts.lora_in_memory_limit and len(networks_in_memory) > 0:
+        name = next(iter(networks_in_memory))
+        networks_in_memory.pop(name, None)
+
+    devices.torch_gc()
+
+
+
 def load_networks(names, te_multipliers=None, unet_multipliers=None, dyn_dims=None):
     already_loaded = {}
 
@@ -212,15 +221,19 @@ def load_networks(names, te_multipliers=None, unet_multipliers=None, dyn_dims=No
 
     failed_to_load_networks = []
 
-    for i, name in enumerate(names):
+    for i, (network_on_disk, name) in enumerate(zip(networks_on_disk, names)):
         net = already_loaded.get(name, None)
 
-        network_on_disk = networks_on_disk[i]
-
         if network_on_disk is not None:
+            if net is None:
+                net = networks_in_memory.get(name)
+
             if net is None or os.path.getmtime(network_on_disk.filename) > net.mtime:
                 try:
                     net = load_network(name, network_on_disk)
+
+                    networks_in_memory.pop(name, None)
+                    networks_in_memory[name] = net
                 except Exception as e:
                     errors.display(e, f"loading network {network_on_disk.filename}")
                     continue
@@ -242,6 +255,8 @@ def load_networks(names, te_multipliers=None, unet_multipliers=None, dyn_dims=No
     if failed_to_load_networks:
         sd_hijack.model_hijack.comments.append("Failed to find networks: " + ", ".join(failed_to_load_networks))
 
+    purge_networks_from_memory()
+
 
 def network_restore_weights_from_backup(self: Union[torch.nn.Conv2d, torch.nn.Linear, torch.nn.MultiheadAttention]):
     weights_backup = getattr(self, "network_weights_backup", None)
@@ -462,6 +477,7 @@ def infotext_pasted(infotext, params):
 available_networks = {}
 available_network_aliases = {}
 loaded_networks = []
+networks_in_memory = {}
 available_network_hash_lookup = {}
 forbidden_network_aliases = {}