The Real Reason Open-Source Structured Output Libraries Slow Inference

remilouf · x · 2026-07-04

@remilouf mentioned he finally figured out why open-source structured outputs libraries slow down actual inference: the root cause is tail latency, which gets amplified especially during batching. He pointed out that the solution by dottxt-ai (@dottxtai, the maintainers of Outlines) achieves nearly constant runtime latency, remaining almost entirely unaffected.

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