Given the requirements of scale-to-zero, significantly improving startup time has been a key area of innovation for all JVM implementations for many years. Although JVMs are known for excellent throughput, their startup time lags behind statically compiled languages like Go and C++. The performance, debugging capabilities, and class libraries that the JVM (more broadly, the whole JDK) offers make it a compelling technology to base your applications on. Open Liberty is a cloud-native Java runtime and, like other Java runtimes, is built on JVM technology. The startup time of your runtime can play a big part in scale-out performance. As demand increases, more instances of the application, and runtime, are provisioned this scaling out must happen very quickly so that end users don’t experience a lag in response times. Scale-to-zero is the standard provisioning policy when it comes to deploying applications on the cloud in order to save costs when demand is low. A shift to cloud-native computing has been on the minds of many developers in recent years so that their business applications can benefit from reduced IT infrastructure costs, increased scalability, and more.

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