Early Flush

Airbnb Technology Team

Sep 22, 2023 · Backend Development

Improving Page Performance with HTTP Streaming: Airbnb’s Early Flush Implementation

Airbnb boosted page performance by implementing HTTP streaming with an early‑flush strategy that sends the head chunk first, allowing browsers to start loading CSS and JavaScript while the server fetches data, cutting First Contentful Paint by roughly 100 ms despite challenges like tag handling, buffering, and latency.