On Apr 24, 2008, at 11:29 AM, Charles Oliver Nutter wrote:
I know resources are a problem, but is there any thought going towards
improving switch performance? I know at least one JRuby team member
that
could provide some pretty unpleasant benchmark results that show the
pain we're facing.
That would be a great first project for a new hotspot programmer.
The present set of Sun engineers is a couple hundred feet underwater,
and the upward view shows a number of such optimization projects,
large and small, floating in the sunlight, out of our present reach.
We are not limited by our vision, but by our numbers.
Another difficulty is that it generally takes people a year or two to
get comfortable with the details of the compilers (server and client
JIT). But the fastest way in is total immersion (to continue the
aqueous metaphor).
I personally would enjoy helping someone improve the collection and
use of profiling information in hotspot, for switches. Especially if
it would make bytecode interpreters go faster (most especially, RE
engines).
The first step is to file a bug report (on bad performance of
switch), with test code. The next step is to study the materials on
contributing to OpenJDK.
http://openjdk.java.net/contribute/
-- John
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