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If you trigger you Lambda@Edge function from an OriginRequest or OriginResponse, the result can be cached, but it will only be cached in the nearest Regional Edge Cache. This means that other locations that connect to the same REC will get the cached values, but location which connect to a different REC, will need to resize the image again.
0
It depends on what trigger you use - you can choose to execute the Lambda on every request or only on cache misses. e.g. from https://aws.amazon.com/blogs/networking-and-content-delivery/lambdaedge-design-best-practices/ :
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Please see this AWS solution for Image Optimization: https://github.com/aws-samples/image-optimization
answered 8 days ago
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