Using Nest in AWS Lambda

Has anyone used Nest with AWS Lambda? How did you deal with cold starts? The size of dlls affects performance and Nests library is large, the version we're using is 4 megabytes. Is there a light weight version of the NEST library just for querying?


We recently published some general advice for using the library within FaaS platforms which may be helpful. There will still be a cold start cost to initialise the client, but all FaaS platforms other ways to store global state which removes this cost across executions.

NEST itself has a lot of types to handle all of the possible requests and responses from Elasticsearch. You could drop to the low-level client which does not ship these types and is therefore smaller. However, you will need to handle types to represent the requests and responses.


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