hash with properties instead of file itself

deepface/commons/package_utils.py

@@ -1,5 +1,7 @@
 # built-in dependencies
+import os
 import hashlib
+import platform
 
 # 3rd party dependencies
 import tensorflow as tf
@@ -21,12 +23,22 @@ def get_tf_major_version() -> int:
 
 def find_hash_of_file(file_path: str) -> str:
     """
-    Find hash of image file
+    Find the hash of given image file with its properties
+        finding the hash of image content is costly operation
     Args:
         file_path (str): exact image path
     Returns:
         hash (str): digest with sha1 algorithm
     """
-    with open(file_path, "rb") as f:
-        digest = hashlib.sha1(f.read()).hexdigest()
-    return digest
+    file_stats = os.stat(file_path)
+
+    # some properties
+    file_size = file_stats.st_size
+    creation_time = file_stats.st_ctime
+    modification_time = file_stats.st_mtime
+
+    properties = f"{file_size}-{creation_time}-{modification_time}"
+
+    hasher = hashlib.sha1()
+    hasher.update(properties.encode("utf-8"))
+    return hasher.hexdigest()