Stop Calling Your LLM Once - Split the Call

📰 Hackernoon

Improve LLM app performance by splitting the call into planning and parallel expansion, resulting in faster time-to-first-byte and real parallelism

intermediate Published 27 May 2026
Action Steps
  1. Split the LLM call into a planning call and parallel per-item expansion using API requests
  2. Configure the planning call to handle initial processing and task allocation
  3. Implement parallel expansion for each item using multi-threading or async requests
  4. Test the split call approach to measure performance improvements and bug isolation
  5. Compare the results with the traditional single-call approach to evaluate the benefits
Who Needs to Know This

Developers and engineers working with LLMs can benefit from this approach to improve app performance and efficiency

Key Insight

💡 Splitting the LLM call into planning and parallel expansion can significantly improve performance and efficiency

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🚀 Boost LLM app performance by splitting the call into planning and parallel expansion! 🕒️

Key Takeaways

Improve LLM app performance by splitting the call into planning and parallel expansion, resulting in faster time-to-first-byte and real parallelism

Full Article

Most LLM apps fire one giant prompt and pray. The ones that feel fast in production split the work into a planning call plus parallel per-item expansion. You get three wins for free: a much faster time-to-first-byte, real parallelism, and bug isolation when something breaks. The cost is one extra request. The math almost always favors the split.
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