AWS Lambda now allows asynchronous invocations with a maximum payload size of 1 MB, up from 256 KB. This change enables developers to send more complex data in a single event, simplifying data handling for event-driven applications. Customers can use the Lambda API or receive events from various AWS services.

AWS Lambda response streaming has increased its maximum response payload size to 200 MB, ten times the previous limit, enhancing performance for latency-sensitive applications. This improvement allows for direct processing of large datasets and media files without the need for intermediate services, thereby reducing time to first byte (TTFB) for end-users. The new limit is applicable across all supported AWS Regions and compatible with both Node.js managed and custom runtimes.