LangChain vs LlamaIndex: 1M Document Query Speed Test

📰 Dev.to · TildAlice

Learn how to optimize query speed for large document datasets using LangChain and LlamaIndex, and discover which tool performs better in a 1M document query speed test

advanced Published 8 May 2026
Action Steps
  1. Build a RAG pipeline using LangChain to query 1M documents
  2. Run a query speed test using LlamaIndex on the same dataset
  3. Configure the pipeline to optimize query performance
  4. Test and compare the query speed of both tools
  5. Apply the results to choose the most suitable tool for your specific use case
Who Needs to Know This

Data scientists, software engineers, and DevOps teams working with large document datasets can benefit from this comparison to optimize their query speed and choose the most suitable tool for their use case

Key Insight

💡 Optimizing query speed for large document datasets is crucial, and the right tool can make a significant difference

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🚀 1M document query speed test: LangChain vs LlamaIndex. Which one comes out on top? 🤔

Key Takeaways

Learn how to optimize query speed for large document datasets using LangChain and LlamaIndex, and discover which tool performs better in a 1M document query speed test

Full Article

The 47-Second Query That Shouldn't Exist My RAG pipeline hit a wall at 800K documents....
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