The Hidden Bottleneck in LLM Streaming: Function Calls (And How to Fix It)
Picture this: You’re building a real-time LLM-powered app. Your users are expecting fast, continuous updates from the AI, but instead, they’re staring at a frozen screen. What gives? Perhaps surprisingly — it’s probably not your LLM that’s slowing things down. It’s your function calls . Every time your app makes a call to process data, hit an API, or load a large file, you risk blocking the stream. The result? Delays, lag, and an experience that feels anything but “real-time.”