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Streaming will soon be enabled by default for all Node.js Vercel Functions.
This change will be effective for Hobby accounts starting July 8th, 2024; and for Pro and Enterprise accounts starting October 1st, 2024.
To enable streaming as the default immediately for all your Vercel Functions, set the VERCEL_FORCE_NODEJS_STREAMING environment variable in your project to true. Streaming will be enabled on your next deployment.
Streaming responses from functions will change the format and frequency of your runtime logs. If you are using Log Drains, you should ensure that your ingestion pipeline can handle the new format and increased frequency.
Check out this blog post and our streaming documentation for more details.