add --no-hashing

modules/hashes.py

@@ -4,6 +4,7 @@ import os.path
 
 import filelock
 
+from modules import shared
 from modules.paths import data_path
 
 
@@ -68,6 +69,9 @@ def sha256(filename, title):
     if sha256_value is not None:
         return sha256_value
 
+    if shared.cmd_opts.no_hashing:
+        return None
+
     print(f"Calculating sha256 for {filename}: ", end='')
     sha256_value = calculate_sha256(filename)
     print(f"{sha256_value}")