[Java] Quarkus saves Java Lambda! ??

less than 1 minute read

It’s amazing Quarkus !!!!!!
Java’s Lambda cold start is Chopaya! !!

I tried it with reference to the following official website.


Test target

Last time AWS Lambda Java is slow? , but with the following differences. Are all Quarkus restrictions? Constraint? is.

  • Annotated
  • httpClient is UrlConnectionHttpClient

entire source </summary> <div>

package example;

import javax.inject.Named;

import com.amazonaws.services.lambda.runtime.Context;
import com.amazonaws.services.lambda.runtime.RequestHandler;

import software.amazon.awssdk.services.s3.S3Client;
import software.amazon.awssdk.services.s3.model.PutObjectRequest;
import software.amazon.awssdk.services.s3.model.PutObjectResponse;
import software.amazon.awssdk.core.sync.RequestBody;
import software.amazon.awssdk.regions.Region;

public class TestLambda implements RequestHandler<Object, Object> {

    public Object handleRequest(Object input, Context context) {

        String ENV_BUCKET = System.getenv("BUCKET");

        S3Client s3 = S3Client.builder()

        PutObjectResponse result = s3.putObject(


        return "";


inspection result

Number of times Latency(ms) Processing content
1 2700  
2 250  
3 305  
4 319  
5 187  

Last time the cold start was 6200ms, so it was really fast!

Verification result (+ Provisioned Concurrency)

What would happen if Quarkus, who is such a chopper, is Provisioned? I’m excited.

Number of times Latency(ms) Processing content
1 417  
2 198  
3 206  
4 270  
5 147  

Speed that does not disappoint! Great, Quarkus!


https://quarkus.io/guides/amazon-lambda#tracing-with-aws-xray-and-graalvm https://aws.amazon.com/jp/blogs/architecture/field-notes-optimize-your-java-application-for-aws-lambda-with-quarkus/