  Despite its already widespread popularity, it continues to gain adoption.
More and more developers and architects continue to adopt and apply the FaaS
(Function as a Service) model in cloud solutions. The most extensively used
FaaS service is AWS Lambda, provided by Amazon Web Services. Moreover, despite
the new trends in programming languages, Java still maintains a significant
share of usage. The main problem that arises when using these two technologies
together is widely known: significant latencies and the dreaded cold start.
However, it is possible to greatly mitigate this problem without dedicating too
much effort. In this article, various techniques, strategies and approaches
will be studied with the aim of reducing the cold start and significantly
improving the performance of Lambda functions with Java. Starting from a system
that involves AWS lambda, java, DynamoDB and Api Gateway. Each approach will be
tested independently, analyzing its impact through load tests. Subsequently,
they will be tested in combination in an effort to achieve the greatest
possible performance improvement.
