prevent reloading same model, change event in gradio dropdown happens often?

app.py

@@ -3,7 +3,7 @@ import whisper
 from pytube import YouTube
 
 loaded_model = whisper.load_model("base")
-
+current_size = 'base'
 def inference(link):
   yt = YouTube(link)
   path = yt.streams.filter(only_audio=True)[0].download(filename="audio.mp4")
@@ -12,6 +12,8 @@ def inference(link):
   return results['text']
 
 def change_model(size):
+  if size == curren_size:
+    return
   loaded_model = whisper.load_model(size)
 
 title="Youtube Whisperer"