UltraESB is the first [and still the only] Open Source Enterprise Service Bus (ESB) to utilize Zero-copy proxying with Memory Mapped files and Java Non-Blocking IO for extreme performance!
Usemon is a monitoring system for usage trends, response time and dependency analysis of plain Java applications or big multi-clustered Java Enterprise applications running in production. The proof of Usemon's stability and usefulness is confirmed by the fact that one of the worlds largest telecom operators is running Usemon in a clustered WebSphere environment with over 90 enterprise applications.
Jawr is a tunable packaging solution for Javascript and CSS which allows for rapid development of resources in separate module files. Developers can work with a large set of split javascript files in development mode, then Jawr bundles all together into one or several files in a configurable way.
By using a tag library, Jawr allows you to use the same, unchanged pages for development and production. Jawr also minifies and compresses the files, resulting in reduced page load times.
Slow analyzes web pages and tells you why they're slow based on the rules for high performance web sites. YSlow is a Firefox add-on integrated with the popular Firebug web development tool. YSlow gives you:
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* Performance report card
* HTTP/HTML summary
* List of components in the page
* Tools including JSLint
JumboMem provides a low-effort solution to the problem of running memory-hungry programs on memory-starved computers. The JumboMem software gives programs access to memory spread across multiple computers, providing the illusion that all of the memory resides within a single computer. When a program exceeds the memory in one computer, it automatically spills over into the memory of the next computer.
The developer edition provides ALL of the capabilities of the server edition but limits console and terminal connectivity to the first 45 minutes of a managed JVM's processing. Snapshots taken before the expiration time can still be analyzed offline in the console and the console will reconnect to the JVM once it has been stopped and started.
(FromLinux Magazine Artiecle) Mstone is a multi-protocol stress and performance measurement tool. Mstone can test multiple protocols simultaneously and measures the performance of every transaction. The performance can be graphed throughout the duration of the test.
The Java Application Monitor (JAMon) is a free, simple, high performance, thread safe, Java API that allows developers to easily monitor production applications. * JAMon can be used to determine application performance bottlenecks, user/application intera
InfraRED is a tool for monitoring performance of a J2EE application and diagnosing performance problems. It collects metrics about various aspects of an application's performance and makes it available for quantitative analysis of the application.