RAM Footprint

A program that uses too much memory can force the operating system to rely on virtual memory. Because virtual memory is many times slower than physical RAM, relying on virtual memory can result in slow performance and a poor user experience. While developing your system, be aware of your target deployment environment and consider how much RAM will be available on machines running your software.

Before you can optimize your program's footprint, it's important to understand how memory is used. There are many common misconceptions about how memory is consumed by Java programs, and it is easy to put a lot of effort into footprint control for relatively small gains. By understanding the factors that contribute to footprint, you can make informed decisions when coding.

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