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Re: Forth vs Java in calculating partial sum ;)

From Paul Rubin <no.email@nospam.invalid>
Newsgroups comp.lang.forth
Subject Re: Forth vs Java in calculating partial sum ;)
Date 2014-04-15 09:00 -0700
Organization Nightsong/Fort GNOX
Message-ID <7x61mabn10.fsf@ruckus.brouhaha.com> (permalink)
References (1 earlier) <7x7g6upizf.fsf@ruckus.brouhaha.com> <lihfkl$g58$5@news.albasani.net> <534c6c9c.421218876@news.demon.co.uk> <lii4u9$p42$1@solani.org> <2014Apr15.164448@mips.complang.tuwien.ac.at>

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anton@mips.complang.tuwien.ac.at (Anton Ertl) writes:
> Does not look like my memory-bound idea is actually true, and I don't
> know how to explain the variations (especially why Paysan is slower
> with a big array, but faster with a small one).

I've been wondering about this too-- one idea is that the serial
bandwidth of modern DRAM is tremendous, and maybe there is some cache
preloading happening in the cpu, so big and small arrays don't end up
that much different.  With random access the big array might be
much slower.

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Thread

Forth vs Java in calculating partial sum ;) Melzzzzz <mel@zzzzz.com> - 2014-04-12 19:11 +0200
  Re: Forth vs Java in calculating partial sum ;) Paul Rubin <no.email@nospam.invalid> - 2014-04-12 10:15 -0700
    Re: Forth vs Java in calculating partial sum ;) Melzzzzz <mel@zzzzz.com> - 2014-04-14 22:15 +0200
      Re: Forth vs Java in calculating partial sum ;) stephenXXX@mpeforth.com (Stephen Pelc) - 2014-04-14 23:20 +0000
        Re: Forth vs Java in calculating partial sum ;) Melzzzzz <mel@zzzzz.invalid> - 2014-04-15 04:18 +0200
          Re: Forth vs Java in calculating partial sum ;) m.a.m.hendrix@tue.nl - 2014-04-15 00:32 -0700
            Re: Forth vs Java in calculating partial sum ;) stephenXXX@mpeforth.com (Stephen Pelc) - 2014-04-15 11:33 +0000
            Re: Forth vs Java in calculating partial sum ;) Melzzzzz <mel@zzzzz.com> - 2014-04-15 15:55 +0200
          Re: Forth vs Java in calculating partial sum ;) anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2014-04-15 14:44 +0000
            Re: Forth vs Java in calculating partial sum ;) Paul Rubin <no.email@nospam.invalid> - 2014-04-15 09:00 -0700
              Re: Forth vs Java in calculating partial sum ;) Melzzzzz <mel@zzzzz.invalid> - 2014-04-15 19:38 +0200
            Re: Forth vs Java in calculating partial sum ;) mhx@iae.nl - 2014-04-15 11:41 -0700
            Re: Forth vs Java in calculating partial sum ;) Melzzzzz <mel@zzzzz.com> - 2014-04-16 07:10 +0200
            Re: Forth vs Java in calculating partial sum ;) Melzzzzz <mel@zzzzz.com> - 2014-04-16 07:24 +0200
              Re: Forth vs Java in calculating partial sum ;) anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2014-04-16 10:24 +0000
  Re: Forth vs Java in calculating partial sum ;) mhx@iae.nl - 2014-04-12 13:01 -0700
    Re: Forth vs Java in calculating partial sum ;) mhx@iae.nl - 2014-04-12 13:06 -0700
    Re: Forth vs Java in calculating partial sum ;) Paul Rubin <no.email@nospam.invalid> - 2014-04-12 15:49 -0700
      Re: Forth vs Java in calculating partial sum ;) mhx@iae.nl - 2014-04-12 23:00 -0700
        Re: Forth vs Java in calculating partial sum ;) Paul Rubin <no.email@nospam.invalid> - 2014-04-13 00:14 -0700
          Re: Forth vs Java in calculating partial sum ;) mhx@iae.nl - 2014-04-13 02:03 -0700
        Re: Forth vs Java in calculating partial sum ;) Bernd Paysan <bernd.paysan@gmx.de> - 2014-04-13 14:52 +0200
    Re: Forth vs Java in calculating partial sum ;) "WJ" <w_a_x_man@yahoo.com> - 2014-12-12 23:45 +0000
  Re: Forth vs Java in calculating partial sum ;) mhx@iae.nl - 2014-04-12 13:33 -0700
    Re: Forth vs Java in calculating partial sum ;) Bernd Paysan <bernd.paysan@gmx.de> - 2014-04-12 22:50 +0200
      Re: Forth vs Java in calculating partial sum ;) Melzzzzz <mel@zzzzz.invalid> - 2014-04-13 03:30 +0200
      Re: Forth vs Java in calculating partial sum ;) anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2014-04-13 13:43 +0000
  Re: Forth vs Java in calculating partial sum ;) Andrew Haley <andrew29@littlepinkcloud.invalid> - 2014-04-15 10:05 -0500
  Re: Forth vs Java in calculating partial sum ;) "WJ" <w_a_x_man@yahoo.com> - 2014-12-05 05:46 +0000
  Re: Forth vs Java in calculating partial sum ;) "WJ" <w_a_x_man@yahoo.com> - 2014-12-10 09:50 +0000
    Re: Forth vs Java in calculating partial sum ;) "WJ" <w_a_x_man@yahoo.com> - 2014-12-10 18:29 +0000

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