set use_cache=true for faster decoding

config.json

@@ -21,6 +21,6 @@
   "tie_word_embeddings": false,
   "torch_dtype": "float16",
   "transformers_version": "4.29.2",
-  "use_cache": false,
+  "use_cache": true,
   "vocab_size": 32000
 }