Groups > comp.lang.forth > #20855

Re: Difficulty with Brad Rodriguez' screenful

From	Bernd Paysan <bernd.paysan@gmx.de>
Newsgroups	comp.lang.forth
Subject	Re: Difficulty with Brad Rodriguez' screenful
Date	2013-03-19 19:24 +0100
Organization	1&1 Internet AG
Message-ID	<kiaag4$m0m$1@online.de> (permalink)
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Andrew Haley wrote:
>> So you recommend to keep optimizations which make my code maybe 10%
>> faster, and the force me to use something which makes my code 10
>> times slower?
> 
> I doubt very much that backtracking is a critical speed bottleneck in
> your parser, unless your implementation of THROW is catastrophically
> bad.

The regexp compiler just compiles character tests, conditional jumps, calls 
and returns.  There is only one place with an RDROP.  Maybe this place can 
be "fixed", it just was handy to have RDROP there.  The less standard part 
of the regexp compiler is that I actually implement forward calls (in an 
AHEAD .. THEN fashion, but as calls), and returns within one word.

IIRC, the inspiration to this came from Bill Stoddard's reversible Forth.  
Just remember every decision branch you have made, and be able to return to 
the other branch.  And when you are done, and you have a match, get rid of 
the garbage (and since patterns are nested, you may only get rid of a part 
of your history - that's the one RDROP location - you have found a match).

> There's nothing intrinsically expensive about THROW , and it has
> the virtue of confining its effects to the place where it's needed.
> Full optimization can be used everywhere else.

CATCH needs to gather all the stack pointers (four of them in Gforth), build 
an exception frame on the return stack, and store that in a handler.  THROW 
needs to access this exception frame, and set all the four stacks.

It's certainly intrinsically an order of magnitude more complex than a 
simple EXIT.

> The work that CATCH has to do is pretty small: save a couple of
> pointers and a link on the return stack and update a register to point
> to that frame.  THROW fetches those pointers from that register and
> returns to that point, which removes the link.

That's how we implement it.  That's how it is 10 times more expensive than a 
call + return (and RDROP costs almost nothing).

> I will grant you that the register cache has to be flushed, which is
> expensive, but that's also true if you permit arbitrary return stack
> manipulation.

Yes.

>> In any case, THROW does its work by messing around with the return
>> stack.
> 
> Perhaps, but it is not arbitrary messing around it is much controlled
> than that would imply.  The advantage of THROW as a structuring device
> is that the place it returns to is marked by the caller.  This avoids
> the inversion of control that is caused by messing with the return
> stack, in which the caller cannot determine where the code it just
> called will return to.  It also permits the calling code to be
> refactored.

In the case of the regexp compiler, it's the callee which decides where to 
return to, not the caller (and that depends upon what the callee finds - 
match or fail).

I'm sure that my regexp compiler is just a cheap hack, and that you could do 
a full static evaluation of the call tree and turn all the return stack 
stuff into branches to static addresses.  A GCC-like optimizer certainly 
would be able to do that.

> THROW is just better: it allows more implementation choices and gives
> the compiler more opportunities for optimization.  It's a matter for
> the implementers to do a good job of optimizing it.

If the compiler understands what's going on the return stack, it certainly 
also has more opportunities to optimize things.  The inliners we have today 
are evolved out of pretty crude inliners, and certainly not the state of the 
art (see my GCC example with a higher order function).

-- 
Bernd Paysan
"If you want it done right, you have to do it yourself"
http://bernd-paysan.de/

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Difficulty with Brad Rodriguez' screenful Eduardo Costa <edu500ac@gmail.com> - 2013-03-15 07:10 -0700
  Re: Difficulty with Brad Rodriguez' screenful stephenXXX@mpeforth.com (Stephen Pelc) - 2013-03-15 17:06 +0000
    Re: Difficulty with Brad Rodriguez' screenful Eduardo Costa <edu500ac@gmail.com> - 2013-03-15 11:27 -0700
    Re: Difficulty with Brad Rodriguez' screenful Eduardo Costa <edu500ac@gmail.com> - 2013-03-15 13:06 -0700
    Re: Difficulty with Brad Rodriguez' screenful Eduardo Costa <edu500ac@gmail.com> - 2013-03-15 13:43 -0700
      Re: Difficulty with Brad Rodriguez' screenful "Elizabeth D. Rather" <erather@forth.com> - 2013-03-15 12:17 -1000
        Re: Difficulty with Brad Rodriguez' screenful Eduardo Costa <edu500ac@gmail.com> - 2013-03-16 13:25 -0700
          Re: Difficulty with Brad Rodriguez' screenful mhx@iae.nl (Marcel Hendrix) - 2013-03-17 00:18 +0200
            Re: Difficulty with Brad Rodriguez' screenful Bernd Paysan <bernd.paysan@gmx.de> - 2013-03-17 02:13 +0100
              Re: Difficulty with Brad Rodriguez' screenful "Elizabeth D. Rather" <erather@forth.com> - 2013-03-16 15:29 -1000
                Re: Difficulty with Brad Rodriguez' screenful Bernd Paysan <bernd.paysan@gmx.de> - 2013-03-18 02:03 +0100
                Re: Difficulty with Brad Rodriguez' screenful "Elizabeth D. Rather" <erather@forth.com> - 2013-03-17 15:23 -1000
                Re: Difficulty with Brad Rodriguez' screenful Bernd Paysan <bernd.paysan@gmx.de> - 2013-03-18 04:16 +0100
                Re: Difficulty with Brad Rodriguez' screenful "Elizabeth D. Rather" <erather@forth.com> - 2013-03-17 18:20 -1000
                Re: Difficulty with Brad Rodriguez' screenful stephenXXX@mpeforth.com (Stephen Pelc) - 2013-03-18 13:07 +0000
                Re: Difficulty with Brad Rodriguez' screenful Bernd Paysan <bernd.paysan@gmx.de> - 2013-03-18 21:45 +0100
                Re: Difficulty with Brad Rodriguez' screenful Elizabeth D Rather <erather@forth.com> - 2013-03-18 12:13 -1000
                Re: Difficulty with Brad Rodriguez' screenful Bernd Paysan <bernd.paysan@gmx.de> - 2013-03-19 03:46 +0100
                Re: Difficulty with Brad Rodriguez' screenful stephenXXX@mpeforth.com (Stephen Pelc) - 2013-03-19 09:42 +0000
                Re: Difficulty with Brad Rodriguez' screenful Bernd Paysan <bernd.paysan@gmx.de> - 2013-03-19 17:04 +0100
                Re: Difficulty with Brad Rodriguez' screenful stephenXXX@mpeforth.com (Stephen Pelc) - 2013-03-19 17:54 +0000
                Re: Difficulty with Brad Rodriguez' screenful Brad Eckert <hwfwguy@gmail.com> - 2013-03-19 13:30 -0700
                Re: Difficulty with Brad Rodriguez' screenful Bernd Paysan <bernd.paysan@gmx.de> - 2013-03-19 22:33 +0100
                Re: Difficulty with Brad Rodriguez' screenful albert@spenarnc.xs4all.nl (Albert van der Horst) - 2013-03-19 13:03 +0000
                Re: Difficulty with Brad Rodriguez' screenful anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2013-03-19 14:56 +0000
                Re: Difficulty with Brad Rodriguez' screenful Bernd Paysan <bernd.paysan@gmx.de> - 2013-03-19 21:55 +0100
                Re: Difficulty with Brad Rodriguez' screenful Alex McDonald <blog@rivadpm.com> - 2013-03-19 14:16 -0700
                Re: Difficulty with Brad Rodriguez' screenful Bernd Paysan <bernd.paysan@gmx.de> - 2013-03-20 02:09 +0100
                Re: Difficulty with Brad Rodriguez' screenful anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2013-04-02 16:44 +0000
                Re: Difficulty with Brad Rodriguez' screenful Bernd Paysan <bernd.paysan@gmx.de> - 2013-04-02 22:07 +0200
                Re: Difficulty with Brad Rodriguez' screenful Bernd Paysan <bernd.paysan@gmx.de> - 2013-03-19 20:35 +0100
                Re: Difficulty with Brad Rodriguez' screenful stephenXXX@mpeforth.com (Stephen Pelc) - 2013-03-19 09:52 +0000
                Re: Difficulty with Brad Rodriguez' screenful Bernd Paysan <bernd.paysan@gmx.de> - 2013-03-19 18:56 +0100
                Re: Difficulty with Brad Rodriguez' screenful Andrew Haley <andrew29@littlepinkcloud.invalid> - 2013-03-19 13:18 -0500
                Re: Difficulty with Brad Rodriguez' screenful Bernd Paysan <bernd.paysan@gmx.de> - 2013-03-19 22:37 +0100
                Re: Difficulty with Brad Rodriguez' screenful Andrew Haley <andrew29@littlepinkcloud.invalid> - 2013-03-20 03:33 -0500
                Re: Difficulty with Brad Rodriguez' screenful "Rod Pemberton" <do_not_have@notemailnotq.cpm> - 2013-03-20 05:30 -0400
                Re: Difficulty with Brad Rodriguez' screenful Andrew Haley <andrew29@littlepinkcloud.invalid> - 2013-03-18 11:28 -0500
                Re: Difficulty with Brad Rodriguez' screenful Alex McDonald <blog@rivadpm.com> - 2013-03-18 15:39 -0700
                Re: Difficulty with Brad Rodriguez' screenful albert@spenarnc.xs4all.nl (Albert van der Horst) - 2013-03-19 13:07 +0000
                Re: Difficulty with Brad Rodriguez' screenful m.a.m.hendrix@tue.nl - 2013-03-19 06:58 -0700
                Re: Difficulty with Brad Rodriguez' screenful Bernd Paysan <bernd.paysan@gmx.de> - 2013-03-19 03:05 +0100
                Re: Difficulty with Brad Rodriguez' screenful Andrew Haley <andrew29@littlepinkcloud.invalid> - 2013-03-19 05:27 -0500
                Re: Difficulty with Brad Rodriguez' screenful Bernd Paysan <bernd.paysan@gmx.de> - 2013-03-19 19:24 +0100
                Re: Difficulty with Brad Rodriguez' screenful Andrew Haley <andrew29@littlepinkcloud.invalid> - 2013-03-20 03:42 -0500
                Re: Difficulty with Brad Rodriguez' screenful Andrew Haley <andrew29@littlepinkcloud.invalid> - 2013-03-20 03:54 -0500
                Re: Difficulty with Brad Rodriguez' screenful Bernd Paysan <bernd.paysan@gmx.de> - 2013-03-20 17:49 +0100
                Re: Difficulty with Brad Rodriguez' screenful Andrew Haley <andrew29@littlepinkcloud.invalid> - 2013-03-20 12:51 -0500
                Re: Difficulty with Brad Rodriguez' screenful Bernd Paysan <bernd.paysan@gmx.de> - 2013-03-20 20:25 +0100
                Re: Difficulty with Brad Rodriguez' screenful Andrew Haley <andrew29@littlepinkcloud.invalid> - 2013-03-21 04:31 -0500
                Re: Difficulty with Brad Rodriguez' screenful Bernd Paysan <bernd.paysan@gmx.de> - 2013-03-21 16:31 +0100
                Re: Difficulty with Brad Rodriguez' screenful Andrew Haley <andrew29@littlepinkcloud.invalid> - 2013-03-21 14:48 -0500
                Re: Difficulty with Brad Rodriguez' screenful anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2013-03-21 18:07 +0000
                Re: Difficulty with Brad Rodriguez' screenful Andrew Haley <andrew29@littlepinkcloud.invalid> - 2013-03-21 14:49 -0500
                Re: Difficulty with Brad Rodriguez' screenful Coos Haak <chforth@hccnet.nl> - 2013-03-22 00:07 +0100
                Re: Difficulty with Brad Rodriguez' screenful Andrew Haley <andrew29@littlepinkcloud.invalid> - 2013-03-21 18:31 -0500
                Re: Difficulty with Brad Rodriguez' screenful Coos Haak <chforth@hccnet.nl> - 2013-03-22 00:48 +0100
                Re: Difficulty with Brad Rodriguez' screenful Bernd Paysan <bernd.paysan@gmx.de> - 2013-03-22 01:49 +0100
                Re: Difficulty with Brad Rodriguez' screenful anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2013-03-27 17:30 +0000
                Re: Difficulty with Brad Rodriguez' screenful Andrew Haley <andrew29@littlepinkcloud.invalid> - 2013-03-22 03:57 -0500
                Re: Difficulty with Brad Rodriguez' screenful Alex McDonald <blog@rivadpm.com> - 2013-03-22 03:39 -0700
                Re: Difficulty with Brad Rodriguez' screenful Andrew Haley <andrew29@littlepinkcloud.invalid> - 2013-03-22 09:03 -0500
                Re: Difficulty with Brad Rodriguez' screenful Alex McDonald <blog@rivadpm.com> - 2013-03-23 08:13 -0700
                Re: Difficulty with Brad Rodriguez' screenful Andrew Haley <andrew29@littlepinkcloud.invalid> - 2013-03-23 12:39 -0500
                Re: Difficulty with Brad Rodriguez' screenful Andrew Haley <andrew29@littlepinkcloud.invalid> - 2013-03-23 14:19 -0500
                Re: Difficulty with Brad Rodriguez' screenful Alex McDonald <blog@rivadpm.com> - 2013-03-23 13:01 -0700
                Re: Difficulty with Brad Rodriguez' screenful Brad Eckert <hwfwguy@gmail.com> - 2013-03-22 08:13 -0700
                Re: Difficulty with Brad Rodriguez' screenful anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2013-03-22 14:44 +0000
                Re: Difficulty with Brad Rodriguez' screenful Andrew Haley <andrew29@littlepinkcloud.invalid> - 2013-03-22 10:34 -0500
                Re: Difficulty with Brad Rodriguez' screenful anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2013-03-22 15:39 +0000
                Re: Difficulty with Brad Rodriguez' screenful Bernd Paysan <bernd.paysan@gmx.de> - 2013-03-22 20:38 +0100
                Re: Difficulty with Brad Rodriguez' screenful Bernd Paysan <bernd.paysan@gmx.de> - 2013-03-22 20:54 +0100
                Re: Difficulty with Brad Rodriguez' screenful Andrew Haley <andrew29@littlepinkcloud.invalid> - 2013-03-22 12:27 -0500
                Re: Difficulty with Brad Rodriguez' screenful anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2013-03-22 17:38 +0000
                Re: Difficulty with Brad Rodriguez' screenful Andrew Haley <andrew29@littlepinkcloud.invalid> - 2013-03-22 13:48 -0500
                Re: Difficulty with Brad Rodriguez' screenful anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2013-03-23 11:53 +0000
                Re: Difficulty with Brad Rodriguez' screenful Bernd Paysan <bernd.paysan@gmx.de> - 2013-03-24 01:46 +0100
                Re: Difficulty with Brad Rodriguez' screenful anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2013-03-27 17:04 +0000
                Re: Difficulty with Brad Rodriguez' screenful Brad Eckert <hwfwguy@gmail.com> - 2013-03-25 10:06 -0700
                Re: Difficulty with Brad Rodriguez' screenful anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2013-03-19 16:05 +0000
                Re: Difficulty with Brad Rodriguez' screenful Alex McDonald <blog@rivadpm.com> - 2013-03-19 12:32 -0700
                Re: Difficulty with Brad Rodriguez' screenful anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2013-03-18 18:28 +0000
              Re: Difficulty with Brad Rodriguez' screenful stephenXXX@mpeforth.com (Stephen Pelc) - 2013-03-18 12:40 +0000
                Re: Difficulty with Brad Rodriguez' screenful Bernd Paysan <bernd.paysan@gmx.de> - 2013-03-18 17:23 +0100
                Re: Difficulty with Brad Rodriguez' screenful stephenXXX@mpeforth.com (Stephen Pelc) - 2013-03-18 17:35 +0000
                Re: Difficulty with Brad Rodriguez' screenful Brad Eckert <hwfwguy@gmail.com> - 2013-03-18 11:02 -0700
                Re: Difficulty with Brad Rodriguez' screenful "WJ" <w_a_x_man@yahoo.com> - 2013-03-19 03:25 +0000
                Re: Difficulty with Brad Rodriguez' screenful albert@spenarnc.xs4all.nl (Albert van der Horst) - 2013-03-18 19:35 +0000
                Re: Difficulty with Brad Rodriguez' screenful anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2013-03-18 18:17 +0000
                Re: Difficulty with Brad Rodriguez' screenful Bernd Paysan <bernd.paysan@gmx.de> - 2013-03-19 03:29 +0100
                Re: Difficulty with Brad Rodriguez' screenful Paul Rubin <no.email@nospam.invalid> - 2013-03-19 00:06 -0700
                Re: Difficulty with Brad Rodriguez' screenful Paul Rubin <no.email@nospam.invalid> - 2013-03-19 00:11 -0700
                Re: Difficulty with Brad Rodriguez' screenful Bernd Paysan <bernd.paysan@gmx.de> - 2013-03-19 16:16 +0100
                Re: Difficulty with Brad Rodriguez' screenful anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2013-03-19 15:06 +0000
                Re: Difficulty with Brad Rodriguez' screenful Bernd Paysan <bernd.paysan@gmx.de> - 2013-03-19 22:27 +0100
                Re: Difficulty with Brad Rodriguez' screenful Andrew Haley <andrew29@littlepinkcloud.invalid> - 2013-03-20 03:49 -0500
                Re: Difficulty with Brad Rodriguez' screenful anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2013-03-20 11:09 +0000
                Re: Difficulty with Brad Rodriguez' screenful Andrew Haley <andrew29@littlepinkcloud.invalid> - 2013-03-20 10:25 -0500
                Re: Difficulty with Brad Rodriguez' screenful Bernd Paysan <bernd.paysan@gmx.de> - 2013-03-20 18:08 +0100
                Re: Difficulty with Brad Rodriguez' screenful Andrew Haley <andrew29@littlepinkcloud.invalid> - 2013-03-20 13:04 -0500
                Re: Difficulty with Brad Rodriguez' screenful Bernd Paysan <bernd.paysan@gmx.de> - 2013-03-20 20:12 +0100
                Re: Difficulty with Brad Rodriguez' screenful Andrew Haley <andrew29@littlepinkcloud.invalid> - 2013-03-21 04:39 -0500
                Re: Difficulty with Brad Rodriguez' screenful albert@spenarnc.xs4all.nl (Albert van der Horst) - 2013-03-20 19:22 +0000
                Re: Difficulty with Brad Rodriguez' screenful anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2013-03-30 17:35 +0000
                Re: Difficulty with Brad Rodriguez' screenful Andrew Haley <andrew29@littlepinkcloud.invalid> - 2013-03-31 08:51 -0500
                Re: Difficulty with Brad Rodriguez' screenful anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2013-04-02 15:50 +0000
                Re: Difficulty with Brad Rodriguez' screenful Andrew Haley <andrew29@littlepinkcloud.invalid> - 2013-04-02 16:16 -0500
                Re: Difficulty with Brad Rodriguez' screenful anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2013-04-03 11:57 +0000
                Re: Difficulty with Brad Rodriguez' screenful Andrew Haley <andrew29@littlepinkcloud.invalid> - 2013-04-03 10:25 -0500
                Re: Difficulty with Brad Rodriguez' screenful anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2013-04-03 16:45 +0000
                Re: Difficulty with Brad Rodriguez' screenful Andrew Haley <andrew29@littlepinkcloud.invalid> - 2013-04-03 15:12 -0500
                Re: Difficulty with Brad Rodriguez' screenful Alex McDonald <blog@rivadpm.com> - 2013-03-20 10:27 -0700
                Re: Difficulty with Brad Rodriguez' screenful anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2013-03-20 12:03 +0000
                Re: Difficulty with Brad Rodriguez' screenful Bernd Paysan <bernd.paysan@gmx.de> - 2013-03-20 18:47 +0100
                Re: Difficulty with Brad Rodriguez' screenful anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2013-03-30 16:40 +0000
                Re: Difficulty with Brad Rodriguez' screenful Bernd Paysan <bernd.paysan@gmx.de> - 2013-04-01 02:12 +0200
                Re: Difficulty with Brad Rodriguez' screenful anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2013-04-01 16:58 +0000
                Re: Difficulty with Brad Rodriguez' screenful Bernd Paysan <bernd.paysan@gmx.de> - 2013-04-02 04:20 +0200
                Re: Difficulty with Brad Rodriguez' screenful "Elizabeth D. Rather" <erather@forth.com> - 2013-04-01 16:39 -1000
                Re: Difficulty with Brad Rodriguez' screenful anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2013-04-02 14:15 +0000
                Re: Difficulty with Brad Rodriguez' screenful Bernd Paysan <bernd.paysan@gmx.de> - 2013-04-02 21:12 +0200
                Re: Difficulty with Brad Rodriguez' screenful Andrew Haley <andrew29@littlepinkcloud.invalid> - 2013-04-02 04:17 -0500
                Re: Difficulty with Brad Rodriguez' screenful anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2013-04-02 15:35 +0000
                Re: Difficulty with Brad Rodriguez' screenful Andrew Haley <andrew29@littlepinkcloud.invalid> - 2013-04-02 16:36 -0500
                Re: Difficulty with Brad Rodriguez' screenful Bernd Paysan <bernd.paysan@gmx.de> - 2013-04-03 04:10 +0200
                Re: Difficulty with Brad Rodriguez' screenful Andrew Haley <andrew29@littlepinkcloud.invalid> - 2013-04-03 04:03 -0500
                Re: Difficulty with Brad Rodriguez' screenful Bernd Paysan <bernd.paysan@gmx.de> - 2013-04-03 21:14 +0200
                Re: Difficulty with Brad Rodriguez' screenful anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2013-04-03 16:13 +0000
                Re: Difficulty with Brad Rodriguez' screenful Andrew Haley <andrew29@littlepinkcloud.invalid> - 2013-04-03 11:54 -0500
                Re: Difficulty with Brad Rodriguez' screenful Bernd Paysan <bernd.paysan@gmx.de> - 2013-04-03 22:24 +0200
            Re: Difficulty with Brad Rodriguez' screenful Eduardo Costa <edu500ac@gmail.com> - 2013-03-16 22:27 -0700
              Re: Difficulty with Brad Rodriguez' screenful mhx@iae.nl (Marcel Hendrix) - 2013-03-17 10:10 +0200
                Re: Difficulty with Brad Rodriguez' screenful mhx@iae.nl (Marcel Hendrix) - 2013-03-17 18:15 +0200
                Re: Difficulty with Brad Rodriguez' screenful Eduardo Costa <edu500ac@gmail.com> - 2013-03-17 13:00 -0700
                Re: Difficulty with Brad Rodriguez' screenful mhx@iae.nl (Marcel Hendrix) - 2013-03-17 23:34 +0200
                Re: Difficulty with Brad Rodriguez' screenful Eduardo Costa <edu500ac@gmail.com> - 2013-03-17 16:44 -0700
                Re: Difficulty with Brad Rodriguez' screenful "WJ" <w_a_x_man@yahoo.com> - 2013-03-17 23:53 +0000
                Re: Difficulty with Brad Rodriguez' screenful mhx@iae.nl (Marcel Hendrix) - 2013-03-18 23:32 +0200
                Re: Difficulty with Brad Rodriguez' screenful Lars Brinkhoff <lars.spam@nocrew.org> - 2013-03-19 08:12 +0100
                Re: Difficulty with Brad Rodriguez' screenful m.a.m.hendrix@tue.nl - 2013-03-19 00:33 -0700
                Re: Difficulty with Brad Rodriguez' screenful Lars Brinkhoff <lars.spam@nocrew.org> - 2013-03-19 09:39 +0100
                Re: Difficulty with Brad Rodriguez' screenful mhx@iae.nl (Marcel Hendrix) - 2013-03-19 21:11 +0200
                Re: Difficulty with Brad Rodriguez' screenful Elizabeth D Rather <erather@forth.com> - 2013-03-19 10:30 -1000
                Re: Difficulty with Brad Rodriguez' screenful Roelf Toxopeus <rt4all@notthis.hetnet.nl> - 2013-03-19 22:31 +0100
                Re: Difficulty with Brad Rodriguez' screenful Elizabeth D Rather <erather@forth.com> - 2013-03-19 12:09 -1000
                Re: Difficulty with Brad Rodriguez' screenful Bernd Paysan <bernd.paysan@gmx.de> - 2013-03-18 19:23 +0100
      Re: Difficulty with Brad Rodriguez' screenful stephenXXX@mpeforth.com (Stephen Pelc) - 2013-03-16 06:34 +0000
  Re: Difficulty with Brad Rodriguez' screenful junnia@gmail.com - 2013-03-19 07:45 -0700
    Re: Difficulty with Brad Rodriguez' screenful mhx@iae.nl (Marcel Hendrix) - 2013-03-19 21:38 +0200
      Re: Difficulty with Brad Rodriguez' screenful mhx@iae.nl (Marcel Hendrix) - 2013-03-23 01:31 +0200

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