What is the different between AWS::LAMBDA and AWS::LAMBDA::FUNCTION in xray?

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I enable labmda xray on AWS and I am able to see the service map on xray console. But what I don't understand is the different between AWS::LAMBDA and AWS::LAMBDA::FUNCTION. If you look at below screenshot, you will see that my lambda requestTransactionhandler show in two section. One is AWS:Lambda the other is AWS::Lambda::Function. Each of them have a different latency. What is the different between them?

And there are 2 seconds more latency on AWS::Lambda so how can I improve it?

enter image description here

aws-xray aws-lambda amazon-web-services
1 Answers

X-ray divides the function in two parts

  1. Functions's startup overhead represented with AWS::Lambda
  2. Functions's execution time represented with AWS::Lambda::Function

These two parts of function are the two subsegments created by XRay.

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