#Reduce startup time code
The complete code for this exercise is available in this repository. The Netty-related part of this repository is made available by Codrut Stancu via his excellent blog. The bare minimum Docker image sizes needed for running the uberjar versus the native binary.JVM startup time with GraalVM RC4 versus OpenJDK 10.This article compares the following metrics: (This definition is referenced from the Graal website). The resulting program has faster startup time and less runtime memory overhead compared to a Java VM. Substrate VM is written in Java and compiled into the native executable. The resulting program does not run on the Java HotSpot VM, but instead uses necessary components such as memory management and thread scheduling from a different implementation of a virtual machine called Substrate VM. GraalVM allows you to compile a program ahead of time into a native executable. Surely, these gains are not bound to containers or serverless architectures and can be applied to a variety of use cases. Let’s see how GraalVM can be beneficial for Java-based programs in terms of speed and size improvements. Serverless architectures are one such area that needs faster startup times, and applications hosted on container platforms such as Red Hat Openshift can benefit from both fast Java startup time and a smaller Docker image size. Given that Java is still the dominant language for business applications, the need for reducing the startup time for Java is becoming more important.
Microservices and serverless architectures are being implemented, or are a part of the roadmap, in most modern solution stacks.
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