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Groups > comp.lang.java.programmer > #27829

Re: [opinion] javac's default stack space

From Andreas Leitgeb <avl@auth.logic.tuwien.ac.at>
Newsgroups comp.lang.java.programmer
Subject Re: [opinion] javac's default stack space
Date 2014-03-23 20:37 +0000
Organization A noiseless patient Spider
Message-ID <slrnliuhgr.rhr.avl@login.logic.tuwien.ac.at> (permalink)
References <slrnlhoufj.rhr.avl@login.logic.tuwien.ac.at> <bo6barFk52iU1@mid.individual.net> <8KCdnUWaq7z49oLOnZ2dnUVZ8kmdnZ2d@bt.com> <slrnlhvc05.rhr.avl@login.logic.tuwien.ac.at>

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Andreas Leitgeb <avl@auth.logic.tuwien.ac.at> wrote:
> Chris Uppal <chris.uppal@metagnostic.REMOVE-THIS.org> wrote:
>> Agreeing that the most likely culprit is some very[-very-very] deeply nested 
>> syntactic construction, I'd suggest that the most likely causes are: machine 
>> generated-code, and/or exuberant use of the "fluid" style -- you know the one:
>>     someObject
>>         .aaa()
>>         .aab()
>>         .aac()
>>         .aad()
>>     ...several pages later...
>>         .zzx()
>>         .zzy()
>>         .zzz()
>>         ;
>> In the absence of further info, I bet on machine-generated code.
> You landed a double hit :)  The code at hand *is* machine-generated,
> and it *does* contain some rather long chains in this "fluid" style
>
> It didn't occur to me that this would actually count as "nesting".
> I thought, that after each fluid-step it would be at roughly the
> same stack depth as before - not only when running that code,
> but also when compiling it. Given the diagnosed high stack-use
> and my utter lack of other explanations it definitely seems
> plausible, and I'll examine that further.

I meanwhile changed the code-generator to not produce fluid-style
and that also changed a few other things for the better(*), so I'm 
quite glad of the riddance, although I haven't yet bothered to
remove the -J-Xss1m option, so still can't say yet if that really
was it about excessive javac-stack-use ;-)


(*): not directly related to the fluid-style itself, but to the
overall approach.

PS: I vaguely remember having posted something fluid-style related 
a while ago (about type-safety within the fluid), but that's not
the one I changed now. 

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Thread

[opinion] javac's default stack space Andreas Leitgeb <avl@auth.logic.tuwien.ac.at> - 2014-03-09 14:25 +0000
  Re: [opinion] javac's default stack space Robert Klemme <shortcutter@googlemail.com> - 2014-03-10 18:33 +0100
    Re: [opinion] javac's default stack space Andreas Leitgeb <avl@auth.logic.tuwien.ac.at> - 2014-03-10 21:02 +0000
      Re: [opinion] javac's default stack space Robert Klemme <shortcutter@googlemail.com> - 2014-03-11 23:19 +0100
    Re: [opinion] javac's default stack space "Chris Uppal" <chris.uppal@metagnostic.REMOVE-THIS.org> - 2014-03-11 19:56 +0000
      Re: [opinion] javac's default stack space Andreas Leitgeb <avl@auth.logic.tuwien.ac.at> - 2014-03-12 00:53 +0000
        Re: [opinion] javac's default stack space Andreas Leitgeb <avl@auth.logic.tuwien.ac.at> - 2014-03-23 20:37 +0000
  Re: [opinion] javac's default stack space Arne Vajhøj <arne@vajhoej.dk> - 2014-03-10 21:21 -0400
    Re: [opinion] javac's default stack space Andreas Leitgeb <avl@auth.logic.tuwien.ac.at> - 2014-03-11 14:16 +0000
      Re: [opinion] javac's default stack space Arne Vajhøj <arne@vajhoej.dk> - 2014-03-11 18:05 -0400
        Re: [opinion] javac's default stack space Robert Klemme <shortcutter@googlemail.com> - 2014-03-11 23:22 +0100
          Re: [opinion] javac's default stack space Arne Vajhøj <arne@vajhoej.dk> - 2014-03-11 19:50 -0400

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