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Groups > comp.lang.c++ > #9841
| Newsgroups | comp.lang.c++ |
|---|---|
| Subject | Re: Generally, are the programs written by C++ slower than written by C 10% ? |
| References | (9 earlier) <c7c6ebac-3a50-443e-a864-55f25df6ed54@g32g2000pri.googlegroups.com> <Xns9F58C9669BC01myfirstnameosapriee@216.196.109.131> <op.v1ehx8bs2juju3@ajwin7> <jqWdnbaAb5AE6_vTnZ2dnUVZ8gidnZ2d@giganews.com> <Xns9F58EBC0BE4C7myfirstnameosapriee@216.196.109.131> |
| Date | 2011-09-07 00:40 +0200 |
| From | Asger-P <junk@asger-p.dk> |
| Organization | Asger-P |
| Message-ID | <op.v1erxzl52juju3@ajwin7> (permalink) |
Hi Paavo Helde
On the: 06. of september-2011 At: 22:10 Paavo Helde wrote:
> std::string test(cStr, L-1);
>
> And yes, passing L here makes the tests more fair, as malloc/new got the
> size L, but std::string did not in the original version.
That is right, but then the std::string knows the length all
the way arround, so I think it would e fair to give the same
advantage to char array, like this.
int main(int argc, char* argv[])
{
clock_t tbeg;
char *cStr =
"123456789012345678901234567890123456789012345678901234567890";
const int L = strlen( cStr );
tbeg = clock();
for (int i = 0; i < 10000000; i++)
{
std::string test(cStr, L);
std::string test2 = test;
test2 += test;
if( test2[5] == '0' )
std::cout << "error" << std::endl;
}
std::cout << "test 1 use " << clock() - tbeg << std::endl;
tbeg = clock();
for (int i = 0; i < 10000000; i++)
{
char* str = new char[L+1];
strncpy(str, cStr, L);
char* str2 = new char[L*2 + 2];
strncpy(str2, str, L);
strncpy(&str2[L], str, L);
if( str2[5] == '0' )
std::cout << "error" << std::endl;
delete [] str;
delete [] str2;
}
std::cout << "test 2 use " << clock() - tbeg << std::endl;
tbeg = clock();
for (int i = 0; i < 10000000; i++)
{
char* str = (char*)malloc(L+1);
strncpy(str, cStr, L);
char* str2 = (char*)malloc(L*2 + 2);
strncpy(str2, str, L);
strncpy(&str2[L], str, L);
if( str2[5] == '0' )
std::cout << "error" << std::endl;
free(str);
free(str2);
}
std::cout << "test 3 use " << clock() - tbeg << std::endl;
getch();
return 0;
}
and then the numbers are really in favor of char array,
not the amount of coding though.
test 1 use 3744
test 2 use 2090
test 3 use 1623
Best regards
Asger-P
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Generally, are the programs written by C++ slower than written by C 10% ? KaiWen <wenkai1987@gmail.com> - 2011-09-01 01:41 -0700
Re: Generally, are the programs written by C++ slower than written by C 10% ? Ian Collins <ian-news@hotmail.com> - 2011-09-01 21:15 +1200
Re: Generally, are the programs written by C++ slower than written by C 10% ? "Fred Zwarts \(KVI\)" <F.Zwarts@KVI.nl> - 2011-09-01 11:48 +0200
Re: Generally, are the programs written by C++ slower than written by C 10% ? Joshua Maurice <joshuamaurice@gmail.com> - 2011-09-01 15:34 -0700
Re: Generally, are the programs written by C++ slower than written by C 10% ? KaiWen <wenkai1987@gmail.com> - 2011-09-01 19:09 -0700
Re: Generally, are the programs written by C++ slower than written by C 10% ? Ian Collins <ian-news@hotmail.com> - 2011-09-02 14:39 +1200
Re: Generally, are the programs written by C++ slower than written by C 10% ? Krice <paulkp@mbnet.fi> - 2011-09-01 22:33 -0700
Re: Generally, are the programs written by C++ slower than written by C 10% ? Paavo Helde <myfirstname@osa.pri.ee> - 2011-09-02 01:12 -0500
Re: Generally, are the programs written by C++ slower than written by C 10% ? James Kanze <james.kanze@gmail.com> - 2011-09-03 15:25 -0700
Re: Generally, are the programs written by C++ slower than written by C 10% ? Paavo Helde <myfirstname@osa.pri.ee> - 2011-09-04 01:34 -0500
Re: Generally, are the programs written by C++ slower than written by C 10% ? BGB <cr88192@hotmail.com> - 2011-09-04 02:33 -0700
Re: Generally, are the programs written by C++ slower than written by C 10% ? James Kanze <james.kanze@gmail.com> - 2011-09-04 11:00 -0700
Re: Generally, are the programs written by C++ slower than written by C 10% ? Goran <goran.pusic@gmail.com> - 2011-09-01 23:23 -0700
Re: Generally, are the programs written by C++ slower than written by C 10% ? Nick Keighley <nick_keighley_nospam@hotmail.com> - 2011-09-02 03:00 -0700
Re: Generally, are the programs written by C++ slower than written by C 10% ? Goran <goran.pusic@gmail.com> - 2011-09-02 09:39 -0700
Re: Generally, are the programs written by C++ slower than written by C 10% ? Rui Maciel <rui.maciel@gmail.com> - 2011-09-02 12:44 +0100
Re: Generally, are the programs written by C++ slower than written by C 10% ? Rui Maciel <rui.maciel@gmail.com> - 2011-09-02 09:59 +0100
Re: Generally, are the programs written by C++ slower than written by C 10% ? BGB <cr88192@hotmail.com> - 2011-09-02 11:25 -0700
Re: Generally, are the programs written by C++ slower than written by C 10% ? Juha Nieminen <nospam@thanks.invalid> - 2011-09-03 05:51 +0000
Re: Generally, are the programs written by C++ slower than written by C 10% ? BGB <cr88192@hotmail.com> - 2011-09-03 01:45 -0700
Re: Generally, are the programs written by C++ slower than written by C 10% ? Ian Collins <ian-news@hotmail.com> - 2011-09-03 20:53 +1200
Re: Generally, are the programs written by C++ slower than written by C 10% ? BGB <cr88192@hotmail.com> - 2011-09-03 10:49 -0700
Re: Generally, are the programs written by C++ slower than written by C 10% ? Ian Collins <ian-news@hotmail.com> - 2011-09-04 08:15 +1200
Re: Generally, are the programs written by C++ slower than written by C 10% ? BGB <cr88192@hotmail.com> - 2011-09-03 17:50 -0700
Re: Generally, are the programs written by C++ slower than written by C 10% ? Juha Nieminen <nospam@thanks.invalid> - 2011-09-03 16:28 +0000
Re: Generally, are the programs written by C++ slower than written by C 10% ? BGB <cr88192@hotmail.com> - 2011-09-03 10:42 -0700
Re: Generally, are the programs written by C++ slower than written by C 10% ? "Bo Persson" <bop@gmb.dk> - 2011-09-04 11:34 +0200
Re: Generally, are the programs written by C++ slower than written by C 10% ? BGB <cr88192@hotmail.com> - 2011-09-04 09:04 -0700
Re: Generally, are the programs written by C++ slower than written by C 10% ? Juha Nieminen <nospam@thanks.invalid> - 2011-09-04 18:04 +0000
Re: Generally, are the programs written by C++ slower than written by C 10% ? Keith H Duggar <duggar@alum.mit.edu> - 2011-09-04 18:44 -0700
Re: Generally, are the programs written by C++ slower than written by C 10% ? BGB <cr88192@hotmail.com> - 2011-09-04 23:26 -0700
Re: Generally, are the programs written by C++ slower than written by C 10% ? Juha Nieminen <nospam@thanks.invalid> - 2011-09-05 08:01 +0000
Re: Generally, are the programs written by C++ slower than written by C 10% ? BGB <cr88192@hotmail.com> - 2011-09-05 11:45 -0700
Re: Generally, are the programs written by C++ slower than written by C 10% ? Juha Nieminen <nospam@thanks.invalid> - 2011-09-06 06:30 +0000
Re: Generally, are the programs written by C++ slower than written by C 10% ? BGB <cr88192@hotmail.com> - 2011-09-06 07:22 -0700
Re: Generally, are the programs written by C++ slower than written by C 10% ? Miles Bader <miles@gnu.org> - 2011-09-06 16:25 +0900
Re: Generally, are the programs written by C++ slower than written by C 10% ? BGB <cr88192@hotmail.com> - 2011-09-06 07:14 -0700
Re: Generally, are the programs written by C++ slower than written by C 10% ? Miles Bader <miles@gnu.org> - 2011-09-07 12:28 +0900
Re: Generally, are the programs written by C++ slower than written by C 10% ? BGB <cr88192@hotmail.com> - 2011-09-07 16:49 -0700
Re: Generally, are the programs written by C++ slower than written by C 10% ? Noah Roberts <roberts.noah@gmail.com> - 2011-09-07 18:45 -0700
Re: Generally, are the programs written by C++ slower than written by C 10% ? BGB <cr88192@hotmail.com> - 2011-09-08 15:56 -0700
Re: Generally, are the programs written by C++ slower than written by C 10% ? James Kanze <james.kanze@gmail.com> - 2011-09-03 15:32 -0700
Re: Generally, are the programs written by C++ slower than written by C 10% ? BGB <cr88192@hotmail.com> - 2011-09-03 19:16 -0700
Re: Generally, are the programs written by C++ slower than written by C 10% ? Nick Keighley <nick_keighley_nospam@hotmail.com> - 2011-09-05 00:28 -0700
Re: Generally, are the programs written by C++ slower than written by C 10% ? BGB <cr88192@hotmail.com> - 2011-09-05 12:34 -0700
Re: Generally, are the programs written by C++ slower than written by C 10% ? Ian Collins <ian-news@hotmail.com> - 2011-09-06 07:51 +1200
Re: Generally, are the programs written by C++ slower than written by C 10% ? BGB <cr88192@hotmail.com> - 2011-09-05 14:06 -0700
Re: Generally, are the programs written by C++ slower than written by C 10% ? Nick Keighley <nick_keighley_nospam@hotmail.com> - 2011-09-06 00:32 -0700
Re: Generally, are the programs written by C++ slower than written by C 10% ? BGB <cr88192@hotmail.com> - 2011-09-06 07:33 -0700
Re: Generally, are the programs written by C++ slower than written by C 10% ? Nick Keighley <nick_keighley_nospam@hotmail.com> - 2011-09-07 02:52 -0700
Re: Generally, are the programs written by C++ slower than written by C 10% ? BGB <cr88192@hotmail.com> - 2011-09-08 16:24 -0700
Re: Generally, are the programs written by C++ slower than written by C 10% ? Ian Collins <ian-news@hotmail.com> - 2011-09-09 11:38 +1200
Re: Generally, are the programs written by C++ slower than written by C 10% ? BGB <cr88192@hotmail.com> - 2011-09-08 21:39 -0700
Re: Generally, are the programs written by C++ slower than written by C 10% ? Ian Collins <ian-news@hotmail.com> - 2011-09-09 19:01 +1200
Re: Generally, are the programs written by C++ slower than written by C 10% ? BGB <cr88192@hotmail.com> - 2011-09-09 02:45 -0700
Re: Generally, are the programs written by C++ slower than written by C 10% ? Nick Keighley <nick_keighley_nospam@hotmail.com> - 2011-09-09 03:23 -0700
Re: Generally, are the programs written by C++ slower than written by C 10% ? Jorgen Grahn <grahn+nntp@snipabacken.se> - 2011-09-14 23:12 +0000
Re: Generally, are the programs written by C++ slower than written by C 10% ? Nick Keighley <nick_keighley_nospam@hotmail.com> - 2011-09-09 02:40 -0700
Re: Generally, are the programs written by C++ slower than written by C 10% ? BGB <cr88192@hotmail.com> - 2011-09-09 11:19 -0700
Re: Generally, are the programs written by C++ slower than written by C 10% ? Paavo Helde <myfirstname@osa.pri.ee> - 2011-09-09 15:42 -0500
Re: Generally, are the programs written by C++ slower than written by C 10% ? BGB <cr88192@hotmail.com> - 2011-09-09 14:24 -0700
Re: Generally, are the programs written by C++ slower than written by C 10% ? Noah Roberts <roberts.noah@gmail.com> - 2011-09-09 18:22 -0700
Re: Generally, are the programs written by C++ slower than written by C 10% ? BGB <cr88192@hotmail.com> - 2011-09-10 10:11 -0700
Re: Generally, are the programs written by C++ slower than written by C 10% ? Noah Roberts <roberts.noah@gmail.com> - 2011-09-10 10:54 -0700
Re: Generally, are the programs written by C++ slower than written by C 10% ? BGB <cr88192@hotmail.com> - 2011-09-10 14:28 -0700
Re: Generally, are the programs written by C++ slower than written by C 10% ? Miles Bader <miles@gnu.org> - 2011-09-11 12:29 +0900
Re: Generally, are the programs written by C++ slower than written by C 10% ? BGB <cr88192@hotmail.com> - 2011-09-11 00:45 -0700
Re: Generally, are the programs written by C++ slower than written by C 10% ? Joshua Maurice <joshuamaurice@gmail.com> - 2011-09-12 00:39 -0700
Re: Generally, are the programs written by C++ slower than written by C 10% ? Miles Bader <miles@gnu.org> - 2011-09-12 18:06 +0900
Re: Generally, are the programs written by C++ slower than written by C 10% ? Joshua Maurice <joshuamaurice@gmail.com> - 2011-09-12 16:46 -0700
Re: Generally, are the programs written by C++ slower than written by C 10% ? Miles Bader <miles@gnu.org> - 2011-09-13 10:20 +0900
Re: Generally, are the programs written by C++ slower than written by C 10% ? Joshua Maurice <joshuamaurice@gmail.com> - 2011-09-13 13:16 -0700
Re: Generally, are the programs written by C++ slower than written by C 10% ? Nobody <nobody@nowhere.com> - 2011-09-11 04:53 +0100
Re: Generally, are the programs written by C++ slower than written by C 10% ? Miles Bader <miles@gnu.org> - 2011-09-11 14:51 +0900
Re: Generally, are the programs written by C++ slower than written by C 10% ? Nick Keighley <nick_keighley_nospam@hotmail.com> - 2011-09-10 07:46 -0700
Re: Generally, are the programs written by C++ slower than written by C 10% ? KaiWen <wenkai1987@gmail.com> - 2011-09-06 03:10 -0700
Re: Generally, are the programs written by C++ slower than written by C 10% ? Ian Collins <ian-news@hotmail.com> - 2011-09-06 22:50 +1200
Re: Generally, are the programs written by C++ slower than written by C 10% ? KaiWen <wenkai1987@gmail.com> - 2011-09-06 04:48 -0700
Re: Generally, are the programs written by C++ slower than written by C 10% ? yatremblay@bel1lin202.(none) (Yannick Tremblay) - 2011-09-07 09:45 +0000
Re: Generally, are the programs written by C++ slower than written by C 10% ? Ian Collins <ian-news@hotmail.com> - 2011-09-07 21:51 +1200
Re: Generally, are the programs written by C++ slower than written by C 10% ? KaiWen <wenkai1987@gmail.com> - 2011-09-08 00:15 -0700
Re: Generally, are the programs written by C++ slower than written by C 10% ? yatremblay@bel1lin202.(none) (Yannick Tremblay) - 2011-09-08 12:14 +0000
Re: Generally, are the programs written by C++ slower than written by C 10% ? KaiWen <wenkai1987@gmail.com> - 2011-09-08 07:14 -0700
Re: Generally, are the programs written by C++ slower than written by C 10% ? Asger-P <junk@asger-p.dk> - 2011-09-06 13:52 +0200
Re: Generally, are the programs written by C++ slower than written by C 10% ? Paavo Helde <myfirstname@osa.pri.ee> - 2011-09-06 11:47 -0500
Re: Generally, are the programs written by C++ slower than written by C 10% ? Paavo Helde <myfirstname@osa.pri.ee> - 2011-09-06 11:50 -0500
Re: Generally, are the programs written by C++ slower than written by C 10% ? Asger-P <junk@asger-p.dk> - 2011-09-06 21:04 +0200
Re: Generally, are the programs written by C++ slower than written by C 10% ? Leigh Johnston <leigh@i42.co.uk> - 2011-09-06 20:37 +0100
Re: Generally, are the programs written by C++ slower than written by C 10% ? Paavo Helde <myfirstname@osa.pri.ee> - 2011-09-06 15:10 -0500
Re: Generally, are the programs written by C++ slower than written by C 10% ? Leigh Johnston <leigh@i42.co.uk> - 2011-09-06 21:14 +0100
Re: Generally, are the programs written by C++ slower than written by C 10% ? Asger-P <junk@asger-p.dk> - 2011-09-07 00:40 +0200
Re: Generally, are the programs written by C++ slower than written by C 10% ? Leigh Johnston <leigh@i42.co.uk> - 2011-09-06 23:59 +0100
Re: Generally, are the programs written by C++ slower than written by C 10% ? Noah Roberts <roberts.noah@gmail.com> - 2011-09-06 16:26 -0700
Re: Generally, are the programs written by C++ slower than written by C 10% ? Paavo Helde <myfirstname@osa.pri.ee> - 2011-09-06 14:55 -0500
Re: Generally, are the programs written by C++ slower than written by C 10% ? Asger-P <junk@asger-p.dk> - 2011-09-07 00:51 +0200
Re: Generally, are the programs written by C++ slower than written by C 10% ? Paavo Helde <myfirstname@osa.pri.ee> - 2011-09-06 23:29 -0500
Re: Generally, are the programs written by C++ slower than written by C 10% ? Asger-P <junk@asger-p.dk> - 2011-09-07 09:06 +0200
Re: Generally, are the programs written by C++ slower than written by C 10% ? Ian Collins <ian-news@hotmail.com> - 2011-09-07 19:09 +1200
Re: Generally, are the programs written by C++ slower than written by C 10% ? Nobody <nobody@nowhere.com> - 2011-09-07 13:19 +0100
Re: Generally, are the programs written by C++ slower than written by C 10% ? Juha Nieminen <nospam@thanks.invalid> - 2011-09-07 13:01 +0000
Re: Generally, are the programs written by C++ slower than written by C 10% ? Rui Maciel <rui.maciel@gmail.com> - 2011-09-07 14:26 +0100
Re: Generally, are the programs written by C++ slower than written by C 10% ? Asger-P <junk@asger-p.dk> - 2011-09-07 15:49 +0200
Re: Generally, are the programs written by C++ slower than written by C 10% ? BGB <cr88192@hotmail.com> - 2011-09-08 22:49 -0700
Re: Generally, are the programs written by C++ slower than written by C 10% ? Miles Bader <miles@gnu.org> - 2011-09-09 15:25 +0900
Re: Generally, are the programs written by C++ slower than written by C 10% ? BGB <cr88192@hotmail.com> - 2011-09-09 02:50 -0700
Re: Generally, are the programs written by C++ slower than written by C 10% ? Nick Keighley <nick_keighley_nospam@hotmail.com> - 2011-09-09 03:26 -0700
Re: Generally, are the programs written by C++ slower than written by C 10% ? Nick Keighley <nick_keighley_nospam@hotmail.com> - 2011-09-09 03:25 -0700
Re: Generally, are the programs written by C++ slower than written by C 10% ? Nick Keighley <nick_keighley_nospam@hotmail.com> - 2011-09-06 00:24 -0700
Re: Generally, are the programs written by C++ slower than written by C 10% ? yatremblay@bel1lin202.(none) (Yannick Tremblay) - 2011-09-06 13:57 +0000
Re: Generally, are the programs written by C++ slower than written by C 10% ? BGB <cr88192@hotmail.com> - 2011-09-06 08:18 -0700
Re: Generally, are the programs written by C++ slower than written by C 10% ? Nobody <nobody@nowhere.com> - 2011-09-03 08:34 +0100
Re: Generally, are the programs written by C++ slower than written by C 10% ? "A" <a@a.a> - 2011-09-01 11:50 +0200
Re: Generally, are the programs written by C++ slower than written by C 10% ? Rui Maciel <rui.maciel@gmail.com> - 2011-09-01 10:53 +0100
Re: Generally, are the programs written by C++ slower than written by C 10% ? James Kanze <james.kanze@gmail.com> - 2011-09-03 15:11 -0700
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