ragflow/docs/guides/accelerate_question_answering.mdx

---
sidebar_position: 2
slug: /accelerate_doc_indexing_and_question_answering
---

# Accelerate document indexing and question answering
import APITable from '@site/src/components/APITable';

A checklist to speed up document parsing and question answering.

---

Please note that some of your settings may consume a significant amount of time. If you often find that document parsing and question answering are time-consuming, here is a checklist to consider:

## 1. Accelerate document indexing

- Use GPU to reduce embedding time.
- On the configuration page of your knowledge base, switch off **Use RAPTOR to enhance retrieval**.
- The **Knowledge Graph** chunk method (GraphRAG) is time-consuming.
- Disable **Auto-keyword** and **Auto-question** on the configuration page of yor knowledge base, as both depend on the LLM.

## 2. Accelerate question answering

- In the **Prompt Engine** tab of your **Chat Configuration** dialogue, disabling **Multi-turn optimization** will reduce the time required to get an answer from the LLM.
- In the **Prompt Engine** tab of your **Chat Configuration** dialogue, leaving the **Rerank model** field empty will significantly decrease retrieval time.
- In the **Assistant Setting** tab of your **Chat Configuration** dialogue, disabling **Keyword analysis** will reduce the time to receive an answer from the LLM.
- When chatting with your chat assistant, click the light bulb icon above the *current* dialogue and scroll down the popup window to view the time taken for each task:  
   ![enlighten](https://github.com/user-attachments/assets/fedfa2ee-21a7-451b-be66-20125619923c)  


```mdx-code-block
<APITable>
```

| Item name         | Description                                                  |
| ----------------- | ------------------------------------------------------------ |
| Total             | Total time spent on this conversation round, including chunk retrieval and answer generation. |
| Check LLM         | Time to validate the specified LLM.                          |
| Create retriever  | Time to create a chunk retriever.                            |
| Bind embedding    | Time to initialize an embedding model instance.              |
| Bind LLM          | Time to initialize an LLM instance.                           |
| Tune question     | Time to optimize the user query using the context of the mult-turn conversation. |
| Bind reranker     | Time to initialize an reranker model instance for chunk retrieval. |
| Generate keywords | Time to extract keywords from the user query.                |
| Retrieval         | Time to retrieve the chunks.                                 |
| Generate answer   | Time to generate the answer.                                 |

```mdx-code-block
</APITable>
```