I have my AWS lambda, lets call it Lambda-X.
There are other lambdas, I don\'t know their names, that consumes my Lambda-X via API call.
How do I determine t
Take a look at using AWS X-Ray to generate traces for your lambda invocations. You'll get a bit more information than CloudWatch logs will provide, and you can trace things across services to better understand where latency might be coming from. Here's a blog post with an example: https://docs.aws.amazon.com/xray/latest/devguide/xray-services-lambda.html