JRebel is a productivity tool that allows developers to reload code changes instantly. 
It skips the rebuild, restart, and redeploy cycle common in Java development.
JRebel enables developers to get more done in the same amount of time and stay in the flow while coding.
JRebel supports a majority of real-world enterprise java stacks and is easy to install into existing development environments.

译文:
JRebel是一个生产力工具,允许开发人员立即重新加载代码更改。
它跳过了Java开发中常见的重建、重新启动和重新部署周期。
JRebel使开发人员能够在相同的时间内完成更多的工作,并且在编码时保持在流程中。
JRebel支持大多数真实的企业java栈,并且很容易安装到现有的开发环境中。

XRebel is a performance tool for Java development which gives developers real time performance insights
to help them understand and resolve potential issues faster and earlier, during the development phase.

译文:
XRebel是一种用于Java开发的性能工具,它为开发人员提供实时性能洞察,
帮助他们在开发阶段更快、更早地理解和解决潜在的问题。