The AWS Lambda Cold Starts with Java and JavaScript

Comparing the "warm" (invocation) and cold start performance of AWS Lambda functions written in JavaScript on node 14.0:

exports.handler = async (event) => {

    return 'hello,js';

and Java on Amazon Corretto 11:

public class Greetings{

    public String onEvent(Map<String, String> input) {
        return "hello, java";

Both functions were deployed with the default configuration (128 MB RAM, default runtime).

Hint: the performance is similar

The Java AWS Lambda function was deployed with Java CDK with:


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