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January 8, 2019

Azul Systems Announces Zing 18.12, Slashing Java Application Startup Times while Improving Performance with Pauseless Operation

  • Applications start up 5X faster than other Java runtimes while reducing CPU usage by up to 60%
  • “Compile Stashing” technology saves optimized code fragments, reducing the need to compile upon application restart
  • New optimizations for improved application behavior in DevOps workflows
  • Certified compliance with Java SE 11 standards, in addition to Java SE 8 and 7

SUNNYVALE, Calif., – Azul Systems (Azul), the award-winning leader in Java runtime solutions, today announced the general availability (GA) of Zing release 18.12, Azul’s flagship Java virtual machine (JVM).  Certified, tested Zing downloads are available immediately from the Azul website with support for Java SE 11, 8, and 7.

The new Zing release is ideal for DevOps work flows and microservices-based architectures, and can be readily deployed in containerized environments such as those managed by Kubernetes. Zing release 18.12 contains enhancements to Zing’s Falcon optimizing Just-in-Time (JIT) compiler that speed application startup time and reduce CPU use, while delivering better memory management performance when compared to Oracle Hotspot and OpenJDK. Zing 18.12 includes “compile stashing” technology, which saves fully optimized compiled code fragments during runtime enabling them to be re-used when the application is started again, reducing the need to compile during startup and dramatically reducing application startup time.

“Zing 18.12 is an ideal way to drive down costs for any Java workload that must meet specific service levels,” said Gil Tene, Azul Systems CTO. “Zing’s C4 garbage collector eliminates GC tuning effort, makes efficient use of both memory and CPU resources, and ensures that Zing delivers pauseless, jitter-free operation. The end result is that an identically sized Zing-based cluster can deliver up to 2X-5X more transactions per second without breaking an SLA when compared to the same application using Oracle HotSpot. Zing-based systems can handle larger application loads with the same hardware configuration or reduce costs by achieving their performance targets with fewer Cloud resources.”

“We focused on reducing application startup time and more efficient use of CPU cycles in Zing 18.12, helping our customers reach peak levels of application performance five times faster than competing Java runtimes, and thereby greatly reducing the negative operational impacts of rolling out code in DevOps workflows,” said Scott Sellers, Azul Systems president and CEO. “In Zing 18.12 our ReadyNow technology also features ‘compile stashing’ technology that further accelerates application startup. Zing users can attain new levels of performance without extensive tuning.”

On Wednesday, January 9, at 1:00 PM ET / 10 AM PST Azul Deputy CTO Simon Ritter will present a DZone webinar highlighting some of the new features in Zing 18.12. Visit to register.

Free trial downloads of Zing 18.12 that are compatible with the Java version 11,8, and 7 standards are can be accessed at Additional background information regarding Zing is available at

About Azul Systems
Twitter: @azulsystems

Azul Systems, the industry’s only company exclusively focused on Java and the Java Virtual Machine (JVM), builds fully supported, certified standards-compliant Java runtime solutions that bring the power of Java to the enterprise, cloud, and embedded/IoT. Zing is a JVM designed for enterprise Java applications and workloads that require any combination of low latency, high transaction rates, large working memory, and/or consistent response times. Zulu is Azul’s certified, freely available open source build of OpenJDK with a variety of flexible support options, available in configurations for the enterprise, cloud, as well as custom and embedded/IoT devices. For additional information, visit

ZuluFX is a trademark, and Azul Systems, the Azul Systems logo, Zulu, Zing, and ReadyNow are registered trademarks of Azul Systems. Java and OpenJDK are trademarks of Oracle Corporation and/or its affiliated companies in the United States and other countries. All other trademarks are the property of their respective holders.