diff --git a/src/utils/benchmark.py b/src/utils/benchmark.py
new file mode 100644
index 00000000..83099a2f
--- /dev/null
+++ b/src/utils/benchmark.py
@@ -0,0 +1,26 @@
+import time
+import logging
+
+logging.basicConfig(format='%(message)s', level=logging.INFO)
+
+class Benchmark:
+    time_units = {
+        'seconds': 1e9,
+        'milliseconds': 1e6,
+        'microseconds': 1e3,
+        'nanoseconds': 1,
+    }
+
+    def __new__(cls, func):
+        def wrapper(*args, **kwargs):
+            start_time = time.perf_counter_ns()
+            result = func(*args, **kwargs)
+            end_time = time.perf_counter_ns()
+
+            elapsed_time = (end_time - start_time)
+            for unit, factor in cls.time_units.items():
+                if elapsed_time >= factor:
+                    logging.info(f"Function {func.__name__} - {elapsed_time / factor:.2f} {unit}")
+                    break
+            return result
+        return wrapper
diff --git a/src/utils/image.py b/src/utils/image.py
index ce7d204d..8b0966b6 100644
--- a/src/utils/image.py
+++ b/src/utils/image.py
@@ -5,7 +5,7 @@
 from typing import Union
 from src.shared.typings import BBox, GrayImage
 from src.utils.core import hashit, locate
-
+from src.utils.benchmark import Benchmark
 
 # TODO: add types
 # TODO: add unit tests
@@ -41,17 +41,12 @@ def inner(screenshot: GrayImage) -> Union[BBox, None]:
         return inner
     return decorator
 
-
 # TODO: add unit tests
-@njit(cache=True, fastmath=True)
+
 def convertGraysToBlack(arr: np.ndarray) -> np.ndarray:
-    for i in range(len(arr)):
-        for j in range(len(arr[0])):
-            if arr[i, j] >= 50 and arr[i, j] <= 100:
-                arr[i, j] = 0
+    arr[(arr >= 50) & (arr <= 100)] = 0
     return arr
 
-
 # TODO: add unit tests
 def RGBtoGray(image: np.ndarray) -> GrayImage:
     return cv2.cvtColor(image, cv2.COLOR_RGB2GRAY)