Update README.md (#16)

Signed-off-by: Glenn Jocher <glenn.jocher@ultralytics.com>
Co-authored-by: UltralyticsAssistant <web@ultralytics.com>

Author: glenn-jocher

README.md

@@ -21,14 +21,19 @@ pip install ultralytics-autoimport
 Use the `lazy` context manager to defer imports:
 
 ```python
+import time
+
 from autoimport import lazy
 
 with lazy():
-    import torch  # torch is only imported when used
+    t0 = time.perf_counter()
+    import torch  # Import is deferred until first use
+
+    print(f"Initial import time: {time.perf_counter() - t0:.3f}s")  # Example output: 0.000s
 
-    print("Torch imported:", "torch" in globals())
-    torch.cuda.is_available()  # Now torch is imported
-    print("Torch imported:", "torch" in globals())
+t1 = time.perf_counter()
+torch.cuda.is_available()  # Package is actually loaded here
+print(f"First use time: {time.perf_counter() - t1:.3f}s")  # Example output: 0.462s
 ```
 
 ## 🗂 Repository Structure