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Groups > comp.lang.forth > #4630
| From | Julian Fondren <ayrnieu@gmail.com> |
|---|---|
| Newsgroups | comp.lang.forth |
| Subject | Re: Forth Performance Question |
| Date | 2011-08-07 01:01 -0500 |
| Organization | A noiseless patient Spider |
| Message-ID | <86r54x4v6g.fsf@gmail.com> (permalink) |
| References | <f0fc528e-2fdb-42af-a66d-976ebfa73b88@c8g2000prn.googlegroups.com> |
TS <thinksquared@gmail.com> writes:
> Hi,
(This guy's posting from Google Groups, a web interface for Usenet run
by a company that's too inept even to announce to their own users that
their service is having problems. I already sent him an email to warn
him to look for replies in other venues.)
> I'm just starting to learn Forth, and trying to assess the performance
> differences between some of the common free Forths. I ran this
> program:
> : foo 1 1000000 * drop ;
> : test 1 100000000 ?DO foo LOOP ;
>
> On BigForth 2.4.0 it took ~22 sec to run, Retro v11 (with "times"
> syntax, compiled with -O3), took ~23 sec and GForth 0.7.0 ~65 sec to
> run.
bigForth et al actually do the work at run-time, because you told them
to. Java may have noticed that the entire program is a no-op. GCC
certainly can:
$ cat opt.c
int main (void) { int i; for (i = 0; i < 999999; i++); return 0; }
$ gcc -O3 -S opt.c
$ cat opt.s
.file "opt.c"
.section .text.startup,"ax",@progbits
.p2align 4,,15
.globl main
.type main, @function
main:
.LFB0:
.cfi_startproc
xorl %eax, %eax
ret
.cfi_endproc
.LFE0:
.size main, .-main
.ident "GCC: (GNU) 4.6.0 20110603 (Red Hat 4.6.0-10)"
.section .note.GNU-stack,"",@progbits
That's it. See any loops in that?
If your programs need to do a lot of work that can be done at
compile-time, or that reduce to nothing, of the two languages, only
Forth lets you do this explicitly, and very naturally; you don't have
to hope that an optimizer will notice.
> a) Since BigForth is compiles to native code, why is its performance
> similar to Retro, which is interpreted?
Your _benchmark_ doesn't highlight any differences. A benchmark that
gave native code more to do, might do better. A real program should do
better.
Although, I'm not equipped even to agree that Retro is interpreted.
It's one of those defiantly non-ANS Forth-reminiscent languages.
http://en.wikipedia.org/wiki/Software_rot#Example
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Forth Performance Question TS <thinksquared@gmail.com> - 2011-08-06 20:43 -0700
Re: Forth Performance Question "Rod Pemberton" <do_not_have@noavailemail.cmm> - 2011-08-07 01:02 -0400
Re: Forth Performance Question Chris Hinsley <chris.hinsley@gmail.com> - 2011-08-16 12:09 +0100
Re: Forth Performance Question stephenXXX@mpeforth.com (Stephen Pelc) - 2011-08-16 14:08 +0000
Re: Forth Performance Question mhx@iae.nl (Marcel Hendrix) - 2011-08-07 07:45 +0200
Re: Forth Performance Question anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2011-08-07 16:18 +0000
Re: Forth Performance Question Bruno Gauthier <bgauthier@free.fr> - 2011-08-07 07:53 +0200
Re: Forth Performance Question Julian Fondren <ayrnieu@gmail.com> - 2011-08-07 01:01 -0500
Re: Forth Performance Question Albert van der Horst <albert@spenarnc.xs4all.nl> - 2011-08-07 12:50 +0000
Re: Forth Performance Question stephenXXX@mpeforth.com (Stephen Pelc) - 2011-08-07 11:46 +0000
Re: Forth Performance Question Arnold Doray <thinksquared@gmail.com> - 2011-08-10 17:03 +0000
Re: Forth Performance Question Julian Fondren <ayrnieu@gmail.com> - 2011-08-10 13:35 -0500
Re: Forth Performance Question Arnold Doray <thinksquared@gmail.com> - 2011-08-11 15:05 +0000
Re: Forth Performance Question anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2011-08-11 16:26 +0000
Re: Forth Performance Question Arnold Doray <thinksquared@gmail.com> - 2011-08-12 08:15 +0000
Re: Forth Performance Question "Elizabeth D. Rather" <erather@forth.com> - 2011-08-11 22:29 -1000
Re: Forth Performance Question Arnold Doray <thinksquared@gmail.com> - 2011-08-12 10:09 +0000
Re: Forth Performance Question Julian Fondren <ayrnieu@gmail.com> - 2011-08-12 08:15 -0500
Re: Forth Performance Question anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2011-08-12 09:31 +0000
Re: Forth Performance Question crc <charles.childers@gmail.com> - 2011-08-11 10:27 -0700
Re: Forth Performance Question Julian Fondren <ayrnieu@gmail.com> - 2011-08-11 13:18 -0500
Re: Forth Performance Question "Elizabeth D. Rather" <erather@forth.com> - 2011-08-11 12:00 -1000
Re: Forth Performance Question Howerd <howerdo@yahoo.co.uk> - 2011-08-11 15:13 -0700
Re: Forth Performance Question Charles Childers <crc_nospam@retroforth.org> - 2011-08-11 20:52 -0400
Re: Forth Performance Question "Rod Pemberton" <do_not_have@noavailemail.cmm> - 2011-08-12 02:19 -0400
Re: Forth Performance Question Julian Fondren <ayrnieu@gmail.com> - 2011-08-12 02:10 -0500
Re: Forth Performance Question "Elizabeth D. Rather" <erather@forth.com> - 2011-08-11 21:48 -1000
Re: Forth Performance Question "Elizabeth D. Rather" <erather@forth.com> - 2011-08-11 21:41 -1000
Re: Forth Performance Question Charles Childers <crc_nospam@retroforth.org> - 2011-08-10 23:33 -0400
Re: Forth Performance Question Ron Aaron <rambamist@gmail.com> - 2011-08-11 08:59 +0300
Re: Forth Performance Question Arnold Doray <thinksquared@gmail.com> - 2011-08-11 13:48 +0000
Re: Forth Performance Question Charles Childers <crc@retroforth.org> - 2011-08-11 10:30 -0400
Re: Forth Performance Question Ron Aaron <rambamist@gmail.com> - 2011-08-11 08:46 +0300
Re: Forth Performance Question arc <arc@vorsicht-bissig.de> - 2011-08-12 12:20 +0000
Re: Forth Performance Question Arnold Doray <thinksquared@gmail.com> - 2011-08-12 13:59 +0000
Re: Forth Performance Question stephenXXX@mpeforth.com (Stephen Pelc) - 2011-08-12 15:11 +0000
Re: Forth Performance Question Arnold Doray <thinksquared@gmail.com> - 2011-08-12 17:49 +0000
Re: Forth Performance Question stephenXXX@mpeforth.com (Stephen Pelc) - 2011-08-12 19:38 +0000
Re: Forth Performance Question "Elizabeth D. Rather" <erather@forth.com> - 2011-08-12 12:41 -1000
Re: Forth Performance Question Arnold Doray <thinksquared@gmail.com> - 2011-08-13 03:35 +0000
Re: Forth Performance Question "Elizabeth D. Rather" <erather@forth.com> - 2011-08-12 17:52 -1000
Re: Forth Performance Question Paul Rubin <no.email@nospam.invalid> - 2011-08-12 23:55 -0700
Re: Forth Performance Question Albert van der Horst <albert@spenarnc.xs4all.nl> - 2011-08-14 09:01 +0000
Re: Forth Performance Question Paul Rubin <no.email@nospam.invalid> - 2011-08-14 01:36 -0700
Re: Forth Performance Question Arnold Doray <thinksquared@gmail.com> - 2011-08-15 01:43 +0000
Re: Forth Performance Question Hugh Aguilar <hughaguilar96@yahoo.com> - 2011-08-15 16:59 -0700
Re: Forth Performance Question Mark Wills <markrobertwills@yahoo.co.uk> - 2011-08-16 03:25 -0700
Re: Forth Performance Question Arnold Doray <thinksquared@gmail.com> - 2011-08-16 11:22 +0000
Re: Forth Performance Question Hugh Aguilar <hughaguilar96@yahoo.com> - 2011-08-16 14:37 -0700
Re: Forth Performance Question Arnold Doray <thinksquared@gmail.com> - 2011-08-19 14:11 +0000
Re: Forth Performance Question Hugh Aguilar <hughaguilar96@yahoo.com> - 2011-08-22 19:52 -0700
Re: Forth Performance Question Zbiggy <zbigniew2011REMOVE@gmail.REMOVE.com> - 2011-08-13 02:28 +0200
Re: Forth Performance Question Zbiggy <zbigniew2011REMOVE@gmail.REMOVE.com> - 2011-08-12 20:53 +0200
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