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Chapter 49. Application Performance Tuni... > Improving Perceived Response Time

Improving Perceived Response Time

After each application page, the database, and the server environment have been tuned, a page takes as long to respond as the operations it executes. Some of those operations, such as long-running database queries, require that users wait for a response. Studies indicate that the acceptable response time for users is 8 seconds. This means that users wait an average of 8 seconds without a noticeable response before they go elsewhere or click the Refresh button.

The <CFFLUSH> tag can help accelerate users' perceived response time. With this tag, you can flush incremental output to browsers so that users have a visual indication that their request is successful and will be completed soon.


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