Restructured guides (#5555)

### What problem does this PR solve?


### Type of change

- [x] Documentation Update

docs/guides/dataset/accelerate_doc_indexing.mdx

@@ -0,0 +1,18 @@
+---
+sidebar_position: 9
+slug: /accelerate_doc_indexing
+---
+
+# Accelerate document indexing
+import APITable from '@site/src/components/APITable';
+
+A checklist to speed up document parsing.
+
+---
+
+Please note that some of your settings may consume a significant amount of time. If you often find that document parsing is time-consuming, here is a checklist to consider:
+
+- Use GPU to reduce embedding time.
+- On the configuration page of your knowledge base, switch off **Use RAPTOR to enhance retrieval**.
+- Extracting knowledge graph (GraphRAG) is time-consuming.
+- Disable **Auto-keyword** and **Auto-question** on the configuration page of yor knowledge base, as both depend on the LLM.