Log per-node RAM usage during custom node import

ComfyUI already logs how long each custom node takes to import. This adds RAM usage next to it, so users can easily see which custom nodes are using the most memory on startup.

nodes.py

@@ -14,6 +14,7 @@ import math
 import time
 import random
 import logging
+import psutil
 
 from PIL import Image, ImageOps, ImageSequence
 from PIL.PngImagePlugin import PngInfo
@@ -2309,6 +2310,7 @@ async def init_external_custom_nodes():
     base_node_names = set(NODE_CLASS_MAPPINGS.keys())
     node_paths = folder_paths.get_folder_paths("custom_nodes")
     node_import_times = []
+    process = psutil.Process()
     for custom_node_path in node_paths:
         possible_modules = os.listdir(os.path.realpath(custom_node_path))
         if "__pycache__" in possible_modules:
@@ -2329,18 +2331,21 @@ async def init_external_custom_nodes():
                     logging.info(f"Blocked by policy: {module_path}")
                     continue
 
+            rss_before = process.memory_info().rss
             time_before = time.perf_counter()
             success = await load_custom_node(module_path, base_node_names, module_parent="custom_nodes")
-            node_import_times.append((time.perf_counter() - time_before, module_path, success))
+            elapsed = time.perf_counter() - time_before
+            rss_delta = (process.memory_info().rss - rss_before) / (1024 * 1024)
+            node_import_times.append((elapsed, rss_delta, module_path, success))
 
     if len(node_import_times) > 0:
         logging.info("\nImport times for custom nodes:")
         for n in sorted(node_import_times):
-            if n[2]:
+            if n[3]:
                 import_message = ""
             else:
                 import_message = " (IMPORT FAILED)"
-            logging.info("{:6.1f} seconds{}: {}".format(n[0], import_message, n[1]))
+            logging.info("{:6.1f} seconds  RAM {:>6.1f} MB{}: {}".format(n[0], n[1], import_message, n[2]))
         logging.info("")
 
 async def init_builtin_extra_nodes():