Patrick Lacson wrote:
>
> Can someone explain to me the advantage of JIT compilers? It's obviously
> faster .. I've been doing some recusion testing and the Sun JDK 1.3 for
> Linux
> runs on average 3 times faster than the jdk 1.2.2 rc4 from blackdown.org.
Hotspot is a jit compiler. It is jit compiler heavily integrated with
rest of JVM, where previous jits were just code generators sitting on
top of not-so-good vm internals.
So, not there is no advantage for jits - they are using part of vm
dating back to 95. Hotspot is a lot more advanced design.
Note that IBM version of JDK is more than just simple jit on top of sun
one - they have also changed some of inner workings of VM (for example
not longer use handles).
Artur
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