Re: g++ with -O6 slower than with -O2 [was Re: "Microsoft Azure CTO Mark Russinovich: C/C++ should be deprecated"]

From	David Brown <david.brown@hesbynett.no>
Newsgroups	comp.lang.c, comp.lang.c++
Subject	Re: g++ with -O6 slower than with -O2 [was Re: "Microsoft Azure CTO Mark Russinovich: C/C++ should be deprecated"]
Date	2022-09-24 17:05 +0200
Organization	A noiseless patient Spider
Message-ID	<tgn6ba$30itj$1@dont-email.me> (permalink)
References	(5 earlier) <tgii6g$2a5pu$1@dont-email.me> <tgimqg$lv3$1@gioia.aioe.org> <tgk67p$2gt74$1@dont-email.me> <tgkdp0$2hm22$1@dont-email.me> <tgkfdl$2gt74$2@dont-email.me>

Cross-posted to 2 groups.

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On 23/09/2022 16:21, Ralf Goertz wrote:
> Am Fri, 23 Sep 2022 15:53:36 +0200
> schrieb David Brown <david.brown@hesbynett.no>:
> 
>> On 23/09/2022 13:44, Ralf Goertz wrote:
>>> Am Thu, 22 Sep 2022 23:15:44 +0100
>>> schrieb Bart <bc@freeuk.com>:
>>>    
>>>> I've done a bit more than you then in porting a 70-line benchmark
>>>> to it:
>>>>
>>>> https://github.com/sal55/langs/blob/master/fannkuch.txt
>>>
>>> I just implemented the benchmark myself (it should really be called
>>> „Pfannkuchen“) quite straightforwardly (see below). There is a 1995
>>> article about the the benchmark where the authors listed execution
>>> times of (among others) C-versions compiled with "gcc -O2" and just
>>> "gcc". The latter needed almost 4 times as long as the former. I
>>> wondered how "-O6" would compare. So I compiled my program with
>>> that (using n=12 instead of 10 as in the article). To my big
>>> surprise "-O6":
>>
>> Anything higher than -O3 is the same as -O3 in gcc.
> 
> Oh okay. I don't know where I got the idea that 6 was the maximum.

I've seen other compilers that go up to -O6.  gcc has taken the path of 
having explicit control flags for different optimisations, for those 
that want more control, rather than having many levels.  After all, as 
you have seen, a higher numerical level does not always relate well to 
higher speeds.

> 
>>> ~/c> time ./fannkuch
>>> fannkuch(12)=65 equals 65 from oeis
>>>
>>> real    0m36.325s
>>> user    0m36.242s
>>> sys     0m0.045s
>>>
>>> was significantly slower than "-O2):
>>>    
>>> ~/c> time ./fannkuch
>>> fannkuch(12)=65 equals 65 from oeis
>>>
>>> real    0m30.976s
>>> user    0m30.913s
>>> sys     0m0.021s
>>>
>>> What's the reason for that?
>>>    
>>
>> gcc -O3 uses a lot effort trying to get the last few fractions of a
>> percent out of the code - it is rarely used, as it is rarely worth the
>> effort.  And sometimes it backfires.
> 
> As it obviously does with my program. Then again it still surprises me.
> It's 17% slower! I guess the 99% consists of swapping elements in a
> std::array<int, 12>. At least the part I have written but also
> next_permutation() if I remember the algorithm in TAOCP correctly.
> 
>> Typically, this is caused by enthusiastic loop unrolling or inlining
>> that gives code that is /sometimes/ faster, but also sometimes slower
>> due to more misses for instruction caches, return address buffers,
>> branch prediction tables, etc.  Trying to squeeze the last drops of
>> speed out of a compiler is an art - you should expect to work hard at
>> benchmarking, profiling, and testing different compiler options in
>> different parts of the code. Compilers are not omniscient, and don't
>> know everything about your code and how it is used, your processor, or
>> what else might be running on the same system.
> 
>> So generally, gcc -O2 is the normal choice until you are ready to work
>> hard.
>>
>> There are, however, a few flags that can make a very significant
>> difference, depending on source code.
>>
>> "-march" tells the compiler details of the processor you are using,
>> rather than picking the lowest common denominator for the processor
>> family.  "-march=native" tells it that the target is the same as the
>> compiler is running on.  The "-march" flag gives the compiler access
>> to more SIMD and advanced instructions, as well as a more accurate
>> model for scheduling, pipelining, and other processor-specific fine
>> tuning options.
> 
> -march=native makes "-O2" a little bit slower and "-O3" a little bit
> faster but the former is still 11% faster.
> 

Interesting.  "-march=native" usually makes things faster (or smaller) - 
rarely slower.  Maybe your processor is newer than your compiler, so it 
doesn't really know about the details.  Or maybe you were just unlucky.

If you see particular slowdown effects and poor code, and it is the same 
even with relatively current gcc versions, you can always report it. 
Missed or poor optimisation issues are not often the highest prioritised 
issues for gcc development (unlike incorrect code bugs), but the 
developers like to have them in the bugzilla list.  It makes it easier 
to see when an issue is affecting many people.  (If you want to look at 
the generated code with different gcc versions and different compiler 
options, <https://godbolt.org> is your website of choice.)

> Thanks for your explanations.
> 

No problem.

Thread

“Microsoft Azure CTO Mark Russinovich: C/C++ should be deprecated” Lynn McGuire <lynnmcguire5@gmail.com> - 2022-09-21 14:04 -0500
  Re: “Microsoft Azure CTO Mark Russinovich: C/C++ should be deprecated” "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2022-09-21 12:28 -0700
  Re: ???Microsoft Azure CTO Mark Russinovich: C/C++ should be deprecated??? Juha Nieminen <nospam@thanks.invalid> - 2022-09-22 06:16 +0000
    Re: ???Microsoft Azure CTO Mark Russinovich: C/C++ should be deprecated??? David Brown <david.brown@hesbynett.no> - 2022-09-22 09:45 +0200
      Re: ???Microsoft Azure CTO Mark Russinovich: C/C++ should be deprecated??? Single Stage to Orbit <alex.buell@munted.eu> - 2022-09-22 09:42 +0100
        Re: ???Microsoft Azure CTO Mark Russinovich: C/C++ should be deprecated??? David Brown <david.brown@hesbynett.no> - 2022-09-22 11:16 +0200
          Re: ???Microsoft Azure CTO Mark Russinovich: C/C++ should be deprecated??? Ben Bacarisse <ben.usenet@bsb.me.uk> - 2022-09-22 16:48 +0100
            Re: ???Microsoft Azure CTO Mark Russinovich: C/C++ should be deprecated??? David Brown <david.brown@hesbynett.no> - 2022-09-22 23:12 +0200
              Re: ???Microsoft Azure CTO Mark Russinovich: C/C++ should be deprecated??? Ben Bacarisse <ben.usenet@bsb.me.uk> - 2022-09-23 01:40 +0100
    Re: ???Microsoft Azure CTO Mark Russinovich: C/C++ should be deprecated??? Blue-Maned_Hawk <bluemanedhawk@gmail.com> - 2022-09-26 02:07 -0400
      Re: ???Microsoft Azure CTO Mark Russinovich: C/C++ should be deprecated??? David Brown <david.brown@hesbynett.no> - 2022-09-26 08:42 +0200
        Re: ???Microsoft Azure CTO Mark Russinovich: C/C++ should be Muttley@dastardlyhq.com - 2022-09-26 15:24 +0000
        Re: ???Microsoft Azure CTO Mark Russinovich: C/C++ should be deprecated??? The Real Non Homosexual <cdalten@gmail.com> - 2022-10-10 19:12 -0700
  Re: ???Microsoft Azure CTO Mark Russinovich: C/C++ should be deprecated??? Juha Nieminen <nospam@thanks.invalid> - 2022-09-22 09:41 +0000
    Re: ???Microsoft Azure CTO Mark Russinovich: C/C++ should be deprecated??? Ben Bacarisse <ben.usenet@bsb.me.uk> - 2022-09-22 16:46 +0100
      Re: ???Microsoft Azure CTO Mark Russinovich: C/C++ should be deprecated??? gazelle@shell.xmission.com (Kenny McCormack) - 2022-09-22 16:15 +0000
      Re: ???Microsoft Azure CTO Mark Russinovich: C/C++ should be deprecated??? David Brown <david.brown@hesbynett.no> - 2022-09-22 20:43 +0200
        Re: ???Microsoft Azure CTO Mark Russinovich: C/C++ should be deprecated??? Ben Bacarisse <ben.usenet@bsb.me.uk> - 2022-09-22 20:15 +0100
          Re: ???Microsoft Azure CTO Mark Russinovich: C/C++ should be deprecated??? David Brown <david.brown@hesbynett.no> - 2022-09-22 22:56 +0200
            Re: ???Microsoft Azure CTO Mark Russinovich: C/C++ should be deprecated??? Bart <bc@freeuk.com> - 2022-09-22 23:15 +0100
              g++ with -O6 slower than with  -O2 [was Re: "Microsoft Azure CTO Mark Russinovich: C/C++ should be deprecated"] Ralf Goertz <me@myprovider.invalid> - 2022-09-23 13:44 +0200
                Re: g++ with -O6 slower than with -O2 [was Re: "Microsoft Azure CTO Mark Russinovich: C/C++ should be deprecated"] Bart <bc@freeuk.com> - 2022-09-23 13:53 +0100
                Re: g++ with -O6 slower than with -O2 [was Re: "Microsoft Azure CTO Mark Russinovich: C/C++ should be deprecated"] David Brown <david.brown@hesbynett.no> - 2022-09-23 15:31 +0200
                Re: g++ with -O6 slower than with -O2 [was Re: "Microsoft Azure CTO Mark Russinovich: C/C++ should be deprecated"] David Brown <david.brown@hesbynett.no> - 2022-09-23 15:53 +0200
                Re: g++ with -O6 slower than with -O2 [was Re: "Microsoft Azure CTO Mark Russinovich: C/C++ should be deprecated"] Ralf Goertz <me@myprovider.invalid> - 2022-09-23 16:21 +0200
                Re: g++ with -O6 slower than with -O2 [was Re: "Microsoft Azure CTO Mark Russinovich: C/C++ should be deprecated"] David Brown <david.brown@hesbynett.no> - 2022-09-24 17:05 +0200
                Re: g++ with -O6 slower than with -O2 [was Re: "Microsoft Azure CTO Mark Russinovich: C/C++ should be deprecated"] red floyd <no.spam.here@its.invalid> - 2022-09-24 12:33 -0700
                Re: g++ with -O6 slower than with -O2 [was Re: "Microsoft Azure CTO Muttley@dastardlyhq.com - 2022-09-25 08:45 +0000
            Re: ???Microsoft Azure CTO Mark Russinovich: C/C++ should be deprecated??? Ben Bacarisse <ben.usenet@bsb.me.uk> - 2022-09-23 00:08 +0100
            Re: ???Microsoft Azure CTO Mark Russinovich: C/C++ should be deprecated??? Juha Nieminen <nospam@thanks.invalid> - 2022-09-23 07:45 +0000
              Re: ???Microsoft Azure CTO Mark Russinovich: C/C++ should be deprecated??? Paavo Helde <eesnimi@osa.pri.ee> - 2022-09-23 12:13 +0300
                Re: ???Microsoft Azure CTO Mark Russinovich: C/C++ should be deprecated??? Juha Nieminen <nospam@thanks.invalid> - 2022-09-23 10:01 +0000
                Re: ???Microsoft Azure CTO Mark Russinovich: C/C++ should be deprecated??? Ben Bacarisse <ben.usenet@bsb.me.uk> - 2022-09-23 11:58 +0100
                Re: ???Microsoft Azure CTO Mark Russinovich: C/C++ should be deprecated??? Juha Nieminen <nospam@thanks.invalid> - 2022-09-26 08:01 +0000
                Re: ???Microsoft Azure CTO Mark Russinovich: C/C++ should be deprecated??? Blue-Maned_Hawk <bluemanedhawk@gmail.com> - 2022-09-26 02:03 -0400
              Re: ???Microsoft Azure CTO Mark Russinovich: C/C++ should be deprecated??? David Brown <david.brown@hesbynett.no> - 2022-09-23 13:32 +0200
              Re: ???Microsoft Azure CTO Mark Russinovich: C/C++ should be deprecated??? red floyd <no.spam.here@its.invalid> - 2022-09-23 14:43 -0700
        Re: ???Microsoft Azure CTO Mark Russinovich: C/C++ should be deprecated??? Juha Nieminen <nospam@thanks.invalid> - 2022-09-23 07:26 +0000
          Re: ???Microsoft Azure CTO Mark Russinovich: C/C++ should be deprecated??? Ben Bacarisse <ben.usenet@bsb.me.uk> - 2022-09-23 11:15 +0100
          Re: ???Microsoft Azure CTO Mark Russinovich: C/C++ should be deprecated??? Keith Thompson <Keith.S.Thompson+u@gmail.com> - 2022-09-23 12:35 -0700
            Re: ???Microsoft Azure CTO Mark Russinovich: C/C++ should be deprecated??? "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2022-09-23 12:44 -0700
            Re: ???Microsoft Azure CTO Mark Russinovich: C/C++ should be deprecated??? Juha Nieminen <nospam@thanks.invalid> - 2022-09-26 08:09 +0000
    Re: ???Microsoft Azure CTO Mark Russinovich: C/C++ should be deprecated??? Bonita Montero <Bonita.Montero@gmail.com> - 2022-09-24 13:25 +0200
      Re: ???Microsoft Azure CTO Mark Russinovich: C/C++ should be deprecated??? Juha Nieminen <nospam@thanks.invalid> - 2022-09-26 08:13 +0000
        Re: ???Microsoft Azure CTO Mark Russinovich: C/C++ should be deprecated??? Keith Thompson <Keith.S.Thompson+u@gmail.com> - 2022-09-26 10:44 -0700
          Re: ???Microsoft Azure CTO Mark Russinovich: C/C++ should be deprecated??? Juha Nieminen <nospam@thanks.invalid> - 2022-09-27 06:26 +0000
            Re: ???Microsoft Azure CTO Mark Russinovich: C/C++ should be deprecated??? Joe Pfeiffer <pfeiffer@cs.nmsu.edu> - 2022-09-27 09:56 -0600
            Re: ???Microsoft Azure CTO Mark Russinovich: C/C++ should be deprecated??? Keith Thompson <Keith.S.Thompson+u@gmail.com> - 2022-09-27 10:50 -0700
    Re: ???Microsoft Azure CTO Mark Russinovich: C/C++ should be deprecated??? Blue-Maned_Hawk <bluemanedhawk@gmail.com> - 2022-09-26 01:57 -0400
  Re: “Microsoft Azure CTO Mark Russinovich: C/C++ should be deprecated” Jens Stuckelberger <Jens_Stuckelberger@nowhere.net> - 2022-09-22 14:01 +0000
  Re: “Microsoft Azure CTO Mark Russinovich: C/C++ should be deprecated” Ben Collver <bencollver@tilde.pink> - 2022-09-22 15:19 +0000
    Re: “Microsoft Azure CTO Mark Russinovich: C/C++ should be deprecated” gazelle@shell.xmission.com (Kenny McCormack) - 2022-09-22 15:23 +0000
      Re: “Microsoft Azure CTO Mark Russinovich: C/C++ should be deprecated” "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2022-09-22 12:13 -0700
    Re: “Microsoft Azure CTO Mark Russinovich: C/C++ should be deprecated” Andrea Biscuola <a@abiscuola.com> - 2022-09-22 20:32 +0200
      Re: “Microsoft Azure CTO Mark Russinovich: C/C++ should be deprecated” scott@slp53.sl.home (Scott Lurndal) - 2022-09-22 19:01 +0000
  Re: “Microsoft Azure CTO Mark Russinovich: C/C++ should be deprecated” Richard Harnden <richard.nospam@gmail.com> - 2022-09-22 17:36 +0100
  Re: “Microsoft Azure CTO Mark Russinovich: C/C++ should be deprecated” Kaz Kylheku <864-117-4973@kylheku.com> - 2022-09-23 03:17 +0000
    Re: ???Microsoft Azure CTO Mark Russinovich: C/C++ should be deprecated??? Juha Nieminen <nospam@thanks.invalid> - 2022-09-23 07:50 +0000
      Re: ???Microsoft Azure CTO Mark Russinovich: C/C++ should be deprecated??? David Brown <david.brown@hesbynett.no> - 2022-09-23 13:37 +0200
        Re: ???Microsoft Azure CTO Mark Russinovich: C/C++ should be deprecated??? Juha Nieminen <nospam@thanks.invalid> - 2022-09-26 08:19 +0000
          Re: ???Microsoft Azure CTO Mark Russinovich: C/C++ should be deprecated??? David Brown <david.brown@hesbynett.no> - 2022-09-26 13:55 +0200
            Re: ???Microsoft Azure CTO Mark Russinovich: C/C++ should be deprecated??? Juha Nieminen <nospam@thanks.invalid> - 2022-09-26 14:31 +0000
              Re: ???Microsoft Azure CTO Mark Russinovich: C/C++ should be deprecated??? Bart <bc@freeuk.com> - 2022-09-26 16:05 +0100
                Re: ???Microsoft Azure CTO Mark Russinovich: C/C++ should be deprecated??? Juha Nieminen <nospam@thanks.invalid> - 2022-09-27 06:36 +0000
              Re: ???Microsoft Azure CTO Mark Russinovich: C/C++ should be deprecated??? David Brown <david.brown@hesbynett.no> - 2022-09-27 11:21 +0200
                Re: ???Microsoft Azure CTO Mark Russinovich: C/C++ should be deprecated??? Juha Nieminen <nospam@thanks.invalid> - 2022-09-27 13:26 +0000
                Re: ???Microsoft Azure CTO Mark Russinovich: C/C++ should be deprecated??? Bo Persson <bo@bo-persson.se> - 2022-09-27 16:53 +0200
                Re: ???Microsoft Azure CTO Mark Russinovich: C/C++ should be deprecated??? David Brown <david.brown@hesbynett.no> - 2022-09-28 10:32 +0200
                Re: ???Microsoft Azure CTO Mark Russinovich: C/C++ should be deprecated??? Kaz Kylheku <864-117-4973@kylheku.com> - 2022-09-27 18:18 +0000
                Re: ???Microsoft Azure CTO Mark Russinovich: C/C++ should be deprecated??? Paavo Helde <eesnimi@osa.pri.ee> - 2022-09-27 22:32 +0300
                Re: ???Microsoft Azure CTO Mark Russinovich: C/C++ should be deprecated??? Kaz Kylheku <864-117-4973@kylheku.com> - 2022-09-27 23:52 +0000
                Re: ???Microsoft Azure CTO Mark Russinovich: C/C++ should be deprecated??? scott@slp53.sl.home (Scott Lurndal) - 2022-09-27 19:57 +0000
                Re: ???Microsoft Azure CTO Mark Russinovich: C/C++ should be deprecated??? Kaz Kylheku <864-117-4973@kylheku.com> - 2022-09-28 00:03 +0000
                Re: ???Microsoft Azure CTO Mark Russinovich: C/C++ should be deprecated??? James Kuyper <jameskuyper@alumni.caltech.edu> - 2022-09-28 01:30 -0400
                Re: ???Microsoft Azure CTO Mark Russinovich: C/C++ should be deprecated??? Kaz Kylheku <864-117-4973@kylheku.com> - 2022-09-28 08:26 +0000
                Re: ???Microsoft Azure CTO Mark Russinovich: C/C++ should be deprecated??? scott@slp53.sl.home (Scott Lurndal) - 2022-09-28 14:18 +0000
                Re: ???Microsoft Azure CTO Mark Russinovich: C/C++ should be deprecated??? Kaz Kylheku <864-117-4973@kylheku.com> - 2022-09-28 15:26 +0000
                Re: ???Microsoft Azure CTO Mark Russinovich: C/C++ should be deprecated??? James Kuyper <jameskuyper@alumni.caltech.edu> - 2022-09-28 13:15 -0400
                Re: ???Microsoft Azure CTO Mark Russinovich: C/C++ should be deprecated??? Kaz Kylheku <864-117-4973@kylheku.com> - 2022-09-28 23:38 +0000
                Re: ???Microsoft Azure CTO Mark Russinovich: C/C++ should be deprecated??? David Brown <david.brown@hesbynett.no> - 2022-09-29 11:46 +0200
                Re: ???Microsoft Azure CTO Mark Russinovich: C/C++ should be deprecated??? Kaz Kylheku <864-117-4973@kylheku.com> - 2022-09-29 17:58 +0000
                Re: ???Microsoft Azure CTO Mark Russinovich: C/C++ should be deprecated??? David Brown <david.brown@hesbynett.no> - 2022-09-29 20:45 +0200
                Re: ???Microsoft Azure CTO Mark Russinovich: C/C++ should be deprecated??? Kaz Kylheku <864-117-4973@kylheku.com> - 2022-09-30 17:20 +0000
                Re: ???Microsoft Azure CTO Mark Russinovich: C/C++ should be deprecated??? Paavo Helde <eesnimi@osa.pri.ee> - 2022-09-30 20:59 +0300
                Re: ???Microsoft Azure CTO Mark Russinovich: C/C++ should be deprecated??? Michael S <already5chosen@yahoo.com> - 2022-10-01 11:40 -0700
                Re: ???Microsoft Azure CTO Mark Russinovich: C/C++ should be deprecated??? David Brown <david.brown@hesbynett.no> - 2022-10-02 13:38 +0200
                Re: ???Microsoft Azure CTO Mark Russinovich: C/C++ should be deprecated??? Ben Bacarisse <ben.usenet@bsb.me.uk> - 2022-10-02 13:00 +0100
                Re: ???Microsoft Azure CTO Mark Russinovich: C/C++ should be deprecated??? David Brown <david.brown@hesbynett.no> - 2022-10-02 16:20 +0200
                Re: ???Microsoft Azure CTO Mark Russinovich: C/C++ should be deprecated??? David Brown <david.brown@hesbynett.no> - 2022-09-30 09:17 +0200
                Re: ???Microsoft Azure CTO Mark Russinovich: C/C++ should be deprecated??? Kaz Kylheku <864-117-4973@kylheku.com> - 2022-09-30 16:39 +0000
                Re: ???Microsoft Azure CTO Mark Russinovich: C/C++ should be deprecated??? David Brown <david.brown@hesbynett.no> - 2022-10-01 12:47 +0200
                Re: ???Microsoft Azure CTO Mark Russinovich: C/C++ should be deprecated??? scott@slp53.sl.home (Scott Lurndal) - 2022-09-28 14:17 +0000
                Re: ???Microsoft Azure CTO Mark Russinovich: C/C++ should be deprecated??? David Brown <david.brown@hesbynett.no> - 2022-09-28 09:40 +0200
                Re: ???Microsoft Azure CTO Mark Russinovich: C/C++ should be deprecated??? Richard Damon <Richard@Damon-Family.org> - 2022-09-28 07:56 -0400
                Re: ???Microsoft Azure CTO Mark Russinovich: C/C++ should be deprecated??? David Brown <david.brown@hesbynett.no> - 2022-09-28 15:50 +0200
                Re: ???Microsoft Azure CTO Mark Russinovich: C/C++ should be deprecated??? scott@slp53.sl.home (Scott Lurndal) - 2022-09-28 14:21 +0000
                Re: ???Microsoft Azure CTO Mark Russinovich: C/C++ should be deprecated??? scott@slp53.sl.home (Scott Lurndal) - 2022-09-28 16:17 +0000
                Re: ???Microsoft Azure CTO Mark Russinovich: C/C++ should be deprecated??? Kaz Kylheku <864-117-4973@kylheku.com> - 2022-09-28 16:56 +0000
                Re: ???Microsoft Azure CTO Mark Russinovich: C/C++ should be deprecated??? scott@slp53.sl.home (Scott Lurndal) - 2022-09-28 18:48 +0000
                Re: ???Microsoft Azure CTO Mark Russinovich: C/C++ should be deprecated??? David Brown <david.brown@hesbynett.no> - 2022-09-29 11:50 +0200
                Re: ???Microsoft Azure CTO Mark Russinovich: C/C++ should be deprecated??? Richard Damon <Richard@Damon-Family.org> - 2022-09-28 19:33 -0400
            Re: ???Microsoft Azure CTO Mark Russinovich: C/C++ should be deprecated??? rbowman <bowman@montana.com> - 2022-09-26 09:04 -0600
              Re: ???Microsoft Azure CTO Mark Russinovich: C/C++ should be deprecated??? David Brown <david.brown@hesbynett.no> - 2022-09-27 11:27 +0200
                Re: ???Microsoft Azure CTO Mark Russinovich: C/C++ should be deprecated??? Bart <bc@freeuk.com> - 2022-09-27 12:41 +0100
                Re: ???Microsoft Azure CTO Mark Russinovich: C/C++ should be deprecated??? Ben Bacarisse <ben.usenet@bsb.me.uk> - 2022-09-27 15:22 +0100
                Re: ???Microsoft Azure CTO Mark Russinovich: C/C++ should be deprecated??? David Brown <david.brown@hesbynett.no> - 2022-09-27 18:13 +0200
                Re: ???Microsoft Azure CTO Mark Russinovich: C/C++ should be deprecated??? David Brown <david.brown@hesbynett.no> - 2022-09-27 16:50 +0200
                Re: ???Microsoft Azure CTO Mark Russinovich: C/C++ should be deprecated??? rbowman <bowman@montana.com> - 2022-09-27 08:11 -0600
                Re: ???Microsoft Azure CTO Mark Russinovich: C/C++ should be deprecated??? David Brown <david.brown@hesbynett.no> - 2022-09-27 18:10 +0200
                Re: ???Microsoft Azure CTO Mark Russinovich: C/C++ should be deprecated??? rbowman <bowman@montana.com> - 2022-09-27 17:30 -0600
                Re: ???Microsoft Azure CTO Mark Russinovich: C/C++ should be deprecated??? Kaz Kylheku <864-117-4973@kylheku.com> - 2022-09-28 00:26 +0000
                Re: ???Microsoft Azure CTO Mark Russinovich: C/C++ should be deprecated??? David Brown <david.brown@hesbynett.no> - 2022-09-28 11:00 +0200
                Re: ???Microsoft Azure CTO Mark Russinovich: C/C++ should be deprecated??? Ben Bacarisse <ben.usenet@bsb.me.uk> - 2022-09-28 13:33 +0100
      Re: ???Microsoft Azure CTO Mark Russinovich: C/C++ should be deprecated??? Manfred <noname@add.invalid> - 2022-09-25 19:31 +0200
        Re: ???Microsoft Azure CTO Mark Russinovich: C/C++ should be deprecated??? Kaz Kylheku <864-117-4973@kylheku.com> - 2022-09-26 04:53 +0000
          Re: ???Microsoft Azure CTO Mark Russinovich: C/C++ should be deprecated??? David Brown <david.brown@hesbynett.no> - 2022-09-26 08:55 +0200
            Re: ???Microsoft Azure CTO Mark Russinovich: C/C++ should be deprecated??? BGB <cr88192@gmail.com> - 2022-10-01 16:07 -0500
  Re: “Microsoft Azure CTO Mark Russinovich: C/C++ should be deprecated” Opus <ifonly@youknew.org> - 2022-09-23 18:32 +0200
  Re: “Microsoft Azure CTO Mark Russinovich: C/C++ should be deprecated” Blue-Maned_Hawk <bluemanedhawk@gmail.com> - 2022-09-26 02:08 -0400

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