加快索引加载速度

modules/llama_func.py

@@ -82,12 +82,12 @@ def construct_index(
         separator=separator,
     )
     index_name = get_index_name(file_src)
-    documents = get_documents(file_src)
     if os.path.exists(f"./index/{index_name}.json"):
         logging.info("找到了缓存的索引文件，加载中……")
         return GPTSimpleVectorIndex.load_from_disk(f"./index/{index_name}.json")
     else:
         try:
+            documents = get_documents(file_src)
             logging.debug("构建索引中……")
             index = GPTSimpleVectorIndex(
                 documents, llm_predictor=llm_predictor, prompt_helper=prompt_helper