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docs: update remarks on Lambda-bundled AWS SDK #6880

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10 changes: 8 additions & 2 deletions README.md
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Expand Up @@ -195,8 +195,14 @@ we have them listed in [UPGRADING.md](https://github.com/aws/aws-sdk-js-v3/blob/

### General Info

The Lambda provided AWS SDK is set to a specific minor version, and **NOT** the latest version. To check the minor version used by Lambda, please refer to [Lambda runtimes doc page](https://docs.aws.amazon.com/lambda/latest/dg/lambda-runtimes.html).
If you wish to use the latest / different version of the SDK from the one provided by lambda, we recommend that you [bundle and minify](https://aws.amazon.com/blogs/compute/optimizing-node-js-dependencies-in-aws-lambda/) your project, or [upload it as a Lambda layer](https://aws.amazon.com/blogs/compute/using-lambda-layers-to-simplify-your-development-process/).
The Lambda provided AWS SDK is set to a specific minor version, and NOT the latest version. To
determine which version of the SDK is included with the runtime you're using,
see [Runtime-included SDK versions](https://docs.aws.amazon.com/lambda/latest/dg/lambda-nodejs.html#nodejs-sdk-included)
in the Lambda Developer Guide. To maintain full control of your dependencies, and to maximize
backward compatibility during automatic runtime updates, we recommend that you always include
the SDK modules your code uses in your function's deployment package or in a Lambda layer.
See [Backward compatibility](https://docs.aws.amazon.com/lambda/latest/dg/runtimes-update.html#runtime-update-compatibility)
to learn more.

The performance of the AWS SDK for JavaScript v3 on node 18 has improved from v2 as seen in the [performance benchmarking](https://aws.amazon.com/blogs/developer/reduce-lambda-cold-start-times-migrate-to-aws-sdk-for-javascript-v3/)

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