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In this article we'll now add another dimension to our measurements : the choice of HTTP Client implementation. This is also interesting, because starting from AWS SDK for Java version 2.22 AWS added support for their own implementation of the synchronous CRT HTTP Client. The asynchronous CRT HTTP client has been generally available since February 2023. In this article we'll explore synchronous HTTP clients first and leave asynchronous ones for the next article.
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InfluxDB
Purpose built for real-time analytics at any scale. InfluxDB Platform is powered by columnar analytics, optimized for cost-efficient storage, and built with open data standards.
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AWSLambdaJavaSnapStart
Different examples of solutions API Gateway->Lambda->DynamoDB with Lambda managed Java runtimes with different Lambda memory settings, compilation options, (a)synchronous HTTP clients, Lambda layers, GC algorithms and hardware architecture (x86 vs arm64) including Lambda SnapStart enabling and priming techniques to measure Lambda performance
Let's figure out how to configure the HTTP Client. There are 2 places to do it : pom.xml and DynamoProductDao
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The results of the experiment below were based on reproducing more than 100 cold and approximately 100.000 warm starts with experiment which ran for approximately 1 hour. For it (and experiments from my previous article) I used the load test tool hey, but you can use whatever tool you want, like Serverless-artillery or Postman. I ran all these experiments for all 3 scenarios using 2 different compilation options in template.yaml each:
