Am 04.06.2011 16:35, schrieb Krystal Mok:
Hi Jochen,
What you proposed sure is technically feasible, but whether it'd
happen in Harmony, that's another story.
Oh I don't expect you guys to do that, I would do my own changed version.
The three big JVMs, namely HotSpot, JRockit and J9 all perform some
sort of idiom recognition to speed up common idioms. But it's quite
unlikely for them to optimize for any single language other than
Java. If any other language want to run fast on them, it'd either
behave a lot like Java, or it should rely on invokedynamic to talk to
the VM. The latter should be the recommended way to go, as time goes
on, these JVMs should do very good job of optimizing dynamic usage.
The missing pieces would be things like fixnums and the like, but
since Groovy's type system is pretty close to Java's (and doesn't use
fixnums like Ruby does), these shouldn't be a problem.
invokedynamic (I am in the EG) is a good thing for sure. But it does not
solve all problems. Mainly there will be the guards, that swallow a lot
of performance if you compare pure method calls. And we will still have
to keep a lot of meta structures in memory, posing a GC problem.
bye Jochen
--
Jochen "blackdrag" Theodorou
The Groovy Project Tech Lead
http://blackdragsview.blogspot.com/
For Groovy programming sources visit http://groovy.codehaus.org
