Does it make sense in terms of better performance to build a LRU type cache in C/C++ and get java to access it via JNI ?
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Does it make sense in terms of better performance to build a LRU type cache in C/C++ and get java to access it via JNI ?
Doubtful
JVMs do quite a decent job these days, especially considering that any applications that need a cache would probably stay up long enough for the JVM to optimise it quite a bit. Whatever your cache code would gain in speed by avoiding the JVM, you would probably lose pushing objects back and forth through JNI.
Not to mention the inherent development, maintenance and deployment difficulties of C++ code when compared with Java. Or the dangers of reinventing the wheel by rolling out your own cache – there has to be something out there that you could use instead of rolling out your own.