ColdFusion MX for IBM WebSphere Application Server Performance Brief

Short Description
ColdFusion MX for IBM WebSphere Application Server delivers greater application performance than any prior version of ColdFusion. This product has been designed and tuned for maximum performance and scalability by leveraging the power of the underlying J2EE server. It takes full advantage of the performance optimizations available with the IBM Java virtual machine (JVM) version 1.3.1 and provides its own performance-enhancing features, including query and page caching, support for in-memory queries, and built-in facilities for profiling code and identifying bottlenecks.

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Content
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A high performing application is able to deliver content to users quickly. In this brief, application performance is analyzed by measuring page response time: the elapsed time between the submission of a request (the clicking of a submit button, the manual entry of a URL, or the clicking of a link by a user) and the successful completion of that request. A lower response time per request (completing the request more quickly) allows the application to deliver more content overall to more users in a given period of time (throughput).
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One of the major changes made in the ColdFusion MX release affects the execution of ColdFusion templates. In previous release, ColdFusion pages were processed by an interpreter with every request. In ColdFusion MX, this has been changed. When a page is first requested of ColdFusion MX Server or ColdFusion MX for IBM WebSphereJ2EE Application Servers, the page is compiled into Java bytecode, at which point it is executed and then cached to memory and disk. All subsequent requests for that page are handled by the cached bytecode, unless an update to the page forces the page to be recompiled. As this brief illustrates, this change results in a significant gain in performance for production applications. Other factors that affect performance are the ability to take advantage of the high-performance features in the application server on which ColdFusion MX is deploy, such as database connection pooling, process cloning, and clustering.
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