AI Letters #30 - Async Throughput: The Framework Tax on Every Concurrent Request
· 10 min read
Every framework says await. Every framework says "production-ready". At one concurrent request, the difference is invisible. At 50 concurrent requests, LangChain's LCEL middleware costs 19.2% of theoretical throughput while SynapseKit loses only 3.2%. Notebook #22 of the LLM Showdown isolates the framework tax on async IO - and the gap is 7x in overhead milliseconds.