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Re: Good Fowler article on ORM

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David Lamb schrieb:
>
> Many moons ago I was peripherally involved in a project that was
> producing highly optimizing compilers for conventional programming
> languages. I seem to recall some discussion of being able to eliminate
> some heap allocations via dependency analysis, where one could sometimes
> detect that the heap object lifetime didn't extend beyond the invocation
> of the procedure that allocated it. Is this not possible with Java/JIT?

Yes some JITs can do the required escape analysis to some
extent. But when talking about JITs there is always a weak
JIT and a strong JIT, since there are different providers on
the market.

For example I am developing the same code base for later
use in both Swing and Android. And the Dalvik JIT for
Android is lacking a little bit behind, you can even read
recommendations to not use setters/getters (sic!) if possible
in code written for Dalvik.

So I am helping the JIT and I am helping the application.
The code fragment under discussion is heavily used internally
to the API, since the indexing is dynamic. It is still possible
for the dynamic multi-indexing API, the package which has 9 classes,
to provide a proper Iterator interface to the outside, and use
this by the application.

But if you know that youre deployment range will be only
top-notch JITs you might go into the pain of adding additional
class to the package for the iterator implementations. This
would blow up the packgage to 11 classes, counting the
.class files.

Bye

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Thread

Good Fowler article on ORM Arved Sandstrom <asandstrom3minus1@eastlink.ca> - 2012-05-10 19:50 -0300
  Re: Good Fowler article on ORM Roedy Green <see_website@mindprod.com.invalid> - 2012-05-10 16:52 -0700
    Re: Good Fowler article on ORM Arne Vajhøj <arne@vajhoej.dk> - 2012-05-10 20:10 -0400
    Re: Good Fowler article on ORM Leif Roar Moldskred <leifm@dimnakorr.com> - 2012-05-11 01:56 -0500
    Re: Good Fowler article on ORM Jan Burse <janburse@fastmail.fm> - 2012-05-11 10:06 +0200
      Re: Good Fowler article on ORM Jan Burse <janburse@fastmail.fm> - 2012-05-11 10:09 +0200
      Re: Good Fowler article on ORM David Lamb <dalamb@cs.queensu.ca> - 2012-05-11 21:56 -0400
        Re: Good Fowler article on ORM Jan Burse <janburse@fastmail.fm> - 2012-05-12 12:01 +0200
          Re: Good Fowler article on ORM David Lamb <dalamb@cs.queensu.ca> - 2012-05-12 06:22 -0400
            Re: Good Fowler article on ORM Jan Burse <janburse@fastmail.fm> - 2012-05-12 13:14 +0200
              Re: Good Fowler article on ORM Jan Burse <janburse@fastmail.fm> - 2012-05-12 13:27 +0200
              Re: Good Fowler article on ORM markspace <-@.> - 2012-05-12 08:15 -0700
                Re: Good Fowler article on ORM Jan Burse <janburse@fastmail.fm> - 2012-05-12 18:21 +0200
                Re: Good Fowler article on ORM markspace <-@.> - 2012-05-12 10:37 -0700
                Re: Good Fowler article on ORM Lew <noone@lewscanon.com> - 2012-05-12 12:27 -0700
                Re: Dalvik running on the Android device emulator Fredrik Jonson <fredrik@jonson.org> - 2012-05-13 07:21 +0000
                Re: Dalvik running on the Android device emulator David Lamb <dalamb@cs.queensu.ca> - 2012-05-13 08:18 -0400
              Re: Good Fowler article on ORM Lew <noone@lewscanon.com> - 2012-05-12 12:12 -0700
                Re: Good Fowler article on ORM Jan Burse <janburse@fastmail.fm> - 2012-05-12 21:53 +0200
                Re: Good Fowler article on ORM Jan Burse <janburse@fastmail.fm> - 2012-05-12 21:59 +0200
                Re: Good Fowler article on ORM Lew <noone@lewscanon.com> - 2012-05-12 13:55 -0700
                Re: Good Fowler article on ORM Lew <noone@lewscanon.com> - 2012-05-12 13:59 -0700
                Re: Good Fowler article on ORM Jan Burse <janburse@fastmail.fm> - 2012-05-12 23:49 +0200
                Re: Good Fowler article on ORM Lew <noone@lewscanon.com> - 2012-05-12 17:14 -0700
                Re: Good Fowler article on ORM jb <janburse@fastmail.fm> - 2012-05-13 02:11 -0700
                Re: Good Fowler article on ORM Lew <noone@lewscanon.com> - 2012-05-14 22:25 -0700
                Re: Good Fowler article on ORM Arne Vajhøj <arne@vajhoej.dk> - 2012-05-20 22:15 -0400
  Re: Good Fowler article on ORM Arne Vajhøj <arne@vajhoej.dk> - 2012-05-10 20:03 -0400
    Re: Good Fowler article on ORM Daniel Pitts <newsgroup.nospam@virtualinfinity.net> - 2012-05-10 18:40 -0700
      Re: Good Fowler article on ORM Arne Vajhøj <arne@vajhoej.dk> - 2012-05-10 21:42 -0400
    Re: Good Fowler article on ORM Arved Sandstrom <asandstrom3minus1@eastlink.ca> - 2012-05-13 19:40 -0300
  Re: Good Fowler article on ORM markspace <-@.> - 2012-05-10 19:17 -0700
  Re: Good Fowler article on ORM Lew <lewbloch@gmail.com> - 2012-05-10 16:41 -0700
    Re: Good Fowler article on ORM Robert Klemme <shortcutter@googlemail.com> - 2012-05-12 14:33 -0700

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