Why doesn't the JVM cache JIT compiled code?

Question

The canonical JVM implementation from Sun applies some pretty sophisticated optimization to bytecode to obtain near-native execution speeds after the code has been run a few

Answer 1

An updated to the existing answers - Java 8 has a JEP dedicated to solving this:

=> JEP 145: Cache Compiled Code. New link.

At a very high level, its stated goal is:

Save and reuse compiled native code from previous runs in order to improve the startup time of large Java applications.

Hope this helps.