On Linux & Mac, is there a way to pre-cache the JVM – either in RAM, or a state of it, so that when I start a Java program, it starts as fast as C/C++ programs?
I am willing to waste memory to make this happen.
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On Linux & Mac, is there a way to pre-cache the JVM – either in RAM, or a state of it, so that when I start a Java program, it starts as fast as C/C++ programs?
I am willing to waste memory to make this happen.
Yes, but only in the same JVM instance. So you have to load your application into this instance, as servlet container do.
The whole bootleneck of the JVM invocation is class loading, that is the reason for the Java Quickstart that Thorbjørn mentioned.
So you can put the class libs on faster media (ram disk) this will probably fasten your (first) startup. I once installed Netbeans + JSDK on a RAM disk and it starts really fast but once started it will run equal fast than loaded from disk.