HotSpot had been part of the JVM for five years at that point.
https://en.m.wikipedia.org/wiki/HotSpot_(virtual_machine)
That said, in the paper they didn't use sun's JVM they used gcj and their own modified version of gcj.
> We examined the performance of both our new Java implementation as well as standard gcj on a variety of Java applications.
So my point still stands, a lot as changed. The researches chose to use static compilation over a JIT or interpreter.
That said, in the paper they didn't use sun's JVM they used gcj and their own modified version of gcj.
> We examined the performance of both our new Java implementation as well as standard gcj on a variety of Java applications.
So my point still stands, a lot as changed. The researches chose to use static compilation over a JIT or interpreter.