add forced gc after predict

app.py

@@ -5,6 +5,7 @@ Usage:
     python app.py
 """
 import contextlib
+import gc
 import logging
 import os
 import random
@@ -72,6 +73,11 @@ def predict(
         batch_length=token_batch_length,
         **settings,
     )
+    
+    del model
+    del tokenizer
+    gc.collect()
+    
     return summaries