AWS Lambda expands response streaming support to all commercial AWS Regions

AWS Lambda Response Streaming Now Available in All Commercial Regions

AWS Lambda response streaming is now available in all commercial AWS Regions, allowing customers to progressively stream response payloads back to clients as data becomes available. This feature reduces time-to-first-byte (TTFB) latency and is ideal for latency-sensitive workloads.

What to do

• Use the InvokeWithResponseStream API to stream responses incrementally.
• Supported in all commercial Regions via AWS SDKs or Amazon API Gateway REST APIs.
• Response streaming supports Node.js managed runtimes and custom runtimes.

• Limit: Payloads up to a default maximum of 200 MB.
• Cost: Billed based on the number of bytes generated and streamed out of your Lambda function over the first 6 MB.

Source: AWS release notes

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