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Re: dynamic_cast

From Vir Campestris <vir.campestris@invalid.invalid>
Newsgroups comp.lang.c++
Subject Re: dynamic_cast
Date 2021-07-01 21:14 +0100
Organization A noiseless patient Spider
Message-ID <sbl7mh$kb5$1@dont-email.me> (permalink)
References <20210627225136.00005d66@reddwarf.jmc> <sbbr3u$a3j$1@dont-email.me>

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On 28/06/2021 07:44, Bonita Montero wrote:
>> every time you use dynamic_cast an angel gets fucked in the arse by a
>> demon.
> 
> dynamic_cast<> is slow and mostly the things you do with
> it could be done faster through a virtual function call.

Mostly.

I just did a line count on our codebase; we have about 1 dynamic cast 
for every 10k lines. Compare with static_cast - 1 in 300.

(This is over several million lines of cpp files.)

I don't know what all the calls are, but the pattern I am most familiar 
with is: This pointer from my database points to an interface. It might 
be a type 1 object, in which case do ONE(). It might be a type 2, in 
which case do TWO().

Andy

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Thread

dynamic_cast Mr Flibble <flibble@reddwarf.jmc> - 2021-06-27 22:51 +0100
  Re: dynamic_cast Öö Tiib <ootiib@hot.ee> - 2021-06-27 15:01 -0700
  Re: dynamic_cast Branimir Maksimovic <branimir.maksimovic@gmail.com> - 2021-06-27 22:30 +0000
  Re: dynamic_cast "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2021-06-27 16:35 -0700
  Re: dynamic_cast Bonita Montero <Bonita.Montero@gmail.com> - 2021-06-28 08:44 +0200
    Re: dynamic_cast Vir Campestris <vir.campestris@invalid.invalid> - 2021-07-01 21:14 +0100
      Re: dynamic_cast Öö Tiib <ootiib@hot.ee> - 2021-07-01 14:16 -0700
      Re: dynamic_cast red floyd <no.spam.here@its.invalid> - 2021-07-01 17:48 -0700
      Re: dynamic_cast Bonita Montero <Bonita.Montero@gmail.com> - 2021-07-03 14:45 +0200
        Re: dynamic_cast Richard Damon <Richard@Damon-Family.org> - 2021-07-03 09:39 -0400
          Re: dynamic_cast Bonita Montero <Bonita.Montero@gmail.com> - 2021-07-03 15:53 +0200
            Re: dynamic_cast Richard Damon <Richard@Damon-Family.org> - 2021-07-03 09:59 -0400
              Re: dynamic_cast Bonita Montero <Bonita.Montero@gmail.com> - 2021-07-03 17:01 +0200
                Re: dynamic_cast Richard Damon <Richard@Damon-Family.org> - 2021-07-03 11:42 -0400
                Re: dynamic_cast Bonita Montero <Bonita.Montero@gmail.com> - 2021-07-03 18:04 +0200
                Re: dynamic_cast Richard Damon <Richard@Damon-Family.org> - 2021-07-03 13:59 -0400
                Re: dynamic_cast Mr Flibble <flibble@reddwarf.jmc> - 2021-07-03 20:06 +0100
                Re: dynamic_cast Bonita Montero <Bonita.Montero@gmail.com> - 2021-07-04 07:06 +0200
                Re: dynamic_cast Richard Damon <Richard@Damon-Family.org> - 2021-07-03 14:03 -0400
                Re: dynamic_cast Tim Rentsch <tr.17687@z991.linuxsc.com> - 2021-08-07 13:06 -0700

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