Re: Oozing poison

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From	Ian Collins <ian-news@hotmail.com>
Newsgroups	comp.lang.c++
Subject	Re: Oozing poison
Date	Sat, 28 Jan 2012 10:06:36 +1300
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On 01/28/12 09:29 AM, Scott Lurndal wrote:
> Miles Bader<miles@gnu.org>  writes:
>> Ian Collins<ian-news@hotmail.com>  writes:
>>> The only performance impact I have ever measured from the use of
>>> exceptions is improvement.  I have been testing compilers since the mid
>>> 90s and I have only found one compiler/platform (that compiler refused
>>> to inline any function that could throw) where exceptions had a
>>> detrimental impact on performance.
>>
>> Yeah, generally exceptions are very cheap these days, probably cheaper
>> than equivalently-safe explicit-return-value-checking code.  I guess
>> some of the people decrying them may be remembering some of the
>> initial naive implementations using setjmp/longjmp (OK, I guess the
>> exception handling in MS's 32-bit ABI is still kinda of stinky).
>
>
> I tried substituting a 'new uint8[xx}' call to replace a malloc with a try
> catch block for bad_alloc.   I then disassembled the code.   One instruction
> (to test the return value of the malloc) turned into:
>

How comes one version has multiple calls to new and the other one call 
to malloc?

What was the original source?

-- 
Ian Collins

Thread

Oozing poison AD <isquat@gmail.com> - 2012-01-10 04:35 -0800
  Re: Oozing poison Leigh Johnston <leigh@i42.co.uk> - 2012-01-10 15:19 +0000
    Re: Oozing poison AD <isquat@gmail.com> - 2012-01-11 00:43 -0800
      Re: Oozing poison "Alf P. Steinbach" <alf.p.steinbach+usenet@gmail.com> - 2012-01-11 10:01 +0100
        Re: Oozing poison Ian Collins <ian-news@hotmail.com> - 2012-01-11 22:09 +1300
          Re: Oozing poison AD <isquat@gmail.com> - 2012-01-11 01:42 -0800
            Re: Oozing poison Leigh Johnston <leigh@i42.co.uk> - 2012-01-11 13:36 +0000
              Re: Oozing poison John Bokma <john@castleamber.com> - 2012-01-11 10:08 -0600
              Re: Oozing poison AD <isquat@gmail.com> - 2012-01-12 06:08 -0800
                Re: Oozing poison Leigh Johnston <leigh@i42.co.uk> - 2012-01-12 14:13 +0000
                Re: Oozing poison AD <isquat@gmail.com> - 2012-01-17 02:08 -0800
                Re: Oozing poison Henrik Faber <hfaber@invalid.net> - 2012-01-17 12:50 +0100
                Re: Oozing poison Nick Keighley <nick_keighley_nospam@hotmail.com> - 2012-01-13 02:18 -0800
                Re: Oozing poison AD <isquat@gmail.com> - 2012-01-17 02:24 -0800
      Re: Oozing poison Jorgen Grahn <grahn+nntp@snipabacken.se> - 2012-01-11 16:50 +0000
        Re: Oozing poison AD <isquat@gmail.com> - 2012-01-12 06:04 -0800
          Re: Oozing poison Victor Bazarov <v.bazarov@comcast.invalid> - 2012-01-12 10:13 -0500
            Re: Oozing poison AD <isquat@gmail.com> - 2012-01-17 02:19 -0800
              Re: Oozing poison Victor Bazarov <v.bazarov@comcast.invalid> - 2012-01-17 08:04 -0500
              Re: Oozing poison Miles Bader <miles@gnu.org> - 2012-01-18 13:51 +0900
                Re: Oozing poison AD <isquat@gmail.com> - 2012-01-21 04:40 -0800
                Re: Oozing poison Quint Rankid <qbr567@gmail.com> - 2012-01-21 09:05 -0800
                Re: Oozing poison Wil Evers <bouncer@dev.null> - 2012-01-21 18:52 +0000
                Re: Oozing poison Quint Rankid <qbr567@gmail.com> - 2012-01-21 11:33 -0800
                Re: Oozing poison AD <isquat@gmail.com> - 2012-01-25 02:23 -0800
                Re: Oozing poison AD <isquat@gmail.com> - 2012-01-25 02:07 -0800
                Re: Oozing poison Victor Bazarov <v.bazarov@comcast.invalid> - 2012-01-25 07:59 -0500
                Re: Oozing poison Ian Collins <ian-news@hotmail.com> - 2012-01-26 07:54 +1300
                Re: Oozing poison Pavel <pauldontspamtolk@removeyourself.dontspam.yahoo> - 2012-01-21 22:43 -0500
                Re: Oozing poison Ian Collins <ian-news@hotmail.com> - 2012-01-22 21:05 +1300
                Re: Oozing poison Pavel <pauldontspamtolk@removeyourself.dontspam.yahoo> - 2012-01-22 18:21 -0500
                Re: Oozing poison Jorgen Grahn <grahn+nntp@snipabacken.se> - 2012-01-23 15:55 +0000
                Re: Oozing poison gwowen <gwowen@gmail.com> - 2012-01-23 08:37 -0800
                Re: Oozing poison Pavel <pauldontspamtolk@removeyourself.dontspam.yahoo> - 2012-01-24 22:48 -0500
                Re: Oozing poison Jorgen Grahn <grahn+nntp@snipabacken.se> - 2012-01-25 19:44 +0000
                Re: Oozing poison Ian Collins <ian-news@hotmail.com> - 2012-01-26 08:56 +1300
                Re: Oozing poison 88888 Dihedral <dihedral88888@googlemail.com> - 2012-01-25 23:04 -0800
                Re: Oozing poison Nick Keighley <nick_keighley_nospam@hotmail.com> - 2012-01-26 03:24 -0800
                Re: Oozing poison scott@slp53.sl.home (Scott Lurndal) - 2012-01-26 19:13 +0000
                Re: Oozing poison Brian Drummond <brian@shapes.demon.co.uk> - 2012-01-27 00:12 +0000
                Re: Oozing poison "MikeWhy" <boat042-nospam@yahoo.com> - 2012-01-26 22:44 -0600
                Re: Oozing poison 88888 Dihedral <dihedral88888@googlemail.com> - 2012-01-28 14:25 -0800
                Re: Oozing poison Robert Miles <milesrf@Usenet-News.net> - 2012-02-26 22:16 -0600
              Re: Oozing poison "Gernot Frisch" <me@privacy.net> - 2012-01-24 18:21 +0100
                Re: Oozing poison Victor Bazarov <v.bazarov@comcast.invalid> - 2012-01-24 12:41 -0500
                Re: Oozing poison Nick Keighley <nick_keighley_nospam@hotmail.com> - 2012-01-26 03:25 -0800
              Re: Oozing poison Rui Maciel <rui.maciel@gmail.com> - 2012-01-25 19:44 +0000
                Re: Oozing poison Jorgen Grahn <grahn+nntp@snipabacken.se> - 2012-01-26 09:44 +0000
                Re: Oozing poison Rui Maciel <rui.maciel@gmail.com> - 2012-01-26 10:36 +0000
                Re: Oozing poison scott@slp53.sl.home (Scott Lurndal) - 2012-01-26 19:18 +0000
                Re: Oozing poison Jorgen Grahn <grahn+nntp@snipabacken.se> - 2012-01-26 20:42 +0000
                Re: Oozing poison Juha Nieminen <nospam@thanks.invalid> - 2012-01-26 16:30 +0000
                Re: Oozing poison scott@slp53.sl.home (Scott Lurndal) - 2012-01-26 19:24 +0000
                Re: Oozing poison Cholo Lennon <chololennon@hotmail.com> - 2012-01-26 17:13 -0300
                Re: Oozing poison scott@slp53.sl.home (Scott Lurndal) - 2012-01-26 20:55 +0000
                Re: Oozing poison Jorgen Grahn <grahn+nntp@snipabacken.se> - 2012-01-26 22:08 +0000
                Re: Oozing poison scott@slp53.sl.home (Scott Lurndal) - 2012-01-27 00:32 +0000
                Re: Oozing poison Dombo <dombo@disposable.invalid> - 2012-01-28 12:59 +0100
                Re: Oozing poison Cholo Lennon <chololennon@hotmail.com> - 2012-01-27 18:28 -0300
                Re: Oozing poison Jorgen Grahn <grahn+nntp@snipabacken.se> - 2012-01-29 18:02 +0000
                Re: Oozing poison Ian Collins <ian-news@hotmail.com> - 2012-01-27 20:18 +1300
                Re: Oozing poison Miles Bader <miles@gnu.org> - 2012-01-27 18:09 +0900
                Re: Oozing poison scott@slp53.sl.home (Scott Lurndal) - 2012-01-27 20:29 +0000
                Re: Oozing poison Ian Collins <ian-news@hotmail.com> - 2012-01-28 10:06 +1300
                Re: Oozing poison scott@slp53.sl.home (Scott Lurndal) - 2012-01-27 21:26 +0000
                Re: Oozing poison Ian Collins <ian-news@hotmail.com> - 2012-01-28 12:22 +1300
                Re: Oozing poison scott@slp53.sl.home (Scott Lurndal) - 2012-01-28 04:18 +0000
                Re: Oozing poison Miles Bader <miles@gnu.org> - 2012-01-28 13:44 +0900
                Re: Oozing poison scott@slp53.sl.home (Scott Lurndal) - 2012-01-28 21:31 +0000
                Re: Oozing poison Ian Collins <ian-news@hotmail.com> - 2012-01-29 11:32 +1300
                Re: Oozing poison 88888 Dihedral <dihedral88888@googlemail.com> - 2012-01-28 14:55 -0800
                Re: Oozing poison Ian Collins <ian-news@hotmail.com> - 2012-01-29 11:59 +1300
                Re: Oozing poison scott@slp53.sl.home (Scott Lurndal) - 2012-01-30 17:08 +0000
                Re: Oozing poison Ian Collins <ian-news@hotmail.com> - 2012-01-28 18:06 +1300
                Re: Oozing poison scott@slp53.sl.home (Scott Lurndal) - 2012-01-28 22:49 +0000
                Re: Oozing poison Ian Collins <ian-news@hotmail.com> - 2012-01-29 12:22 +1300
                Re: Oozing poison scott@slp53.sl.home (Scott Lurndal) - 2012-01-27 20:16 +0000
                Re: Oozing poison Ian Collins <ian-news@hotmail.com> - 2012-01-28 10:01 +1300
                Re: Oozing poison Juha Nieminen <nospam@thanks.invalid> - 2012-01-28 16:00 +0000
  Re: Oozing poison Jorgen Grahn <grahn+nntp@snipabacken.se> - 2012-01-10 21:42 +0000
    Re: Oozing poison AD <isquat@gmail.com> - 2012-01-17 02:31 -0800

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