AWS Lambda functions using the Node.js 14 runtime now support code packaged as ECMAScript modules, allowing Lambda customers to consume a wider range of JavaScript packages in their Lambda functions. In addition, Lambda customers can now take advantage of ‘top-level await’, a Node.js 14 language feature. When used with Provisioned Concurrency, this improves cold-start performance for functions with asynchronous initialization tasks. For more information, see the blog post Using Node.JS ES Modules and Top-Level Await in AWS Lambda.

Source: AWS