The Workflow SDK on Vercel now uses WebSockets by default for event and stream writes, replacing individual HTTP requests. This change is effective with the upgrade to [email protected] or later and does not require code modifications. As a result, workflows with many steps will make fewer HTTP requests, improving performance and reducing costs. A benchmark showed that the new WebSocket approach delivered a full response 4.2 times faster than the previous implementation, with no chunk delayed over a second.