AWS Lambda@Edge
AWS Lambda@Edge is a serverless computing service that allows developers to run Lambda functions at AWS Edge locations, which are part of the Amazon CloudFront content delivery network (CDN). It enables execution of code in response to CloudFront events, such as viewer requests or origin responses, to customize content delivery, perform authentication, or modify HTTP headers closer to end-users. This reduces latency and improves performance by processing requests at the edge of the network.
Developers should use AWS Lambda@Edge when building applications that require low-latency processing, such as dynamic content personalization, A/B testing, security checks, or real-time image transformations, as it allows code execution near users globally. It is particularly useful for optimizing web performance, implementing custom caching logic, or handling authentication at the edge without managing servers, making it ideal for scalable, serverless architectures that need fast response times.