Ubuntu : Intel® Q6600® quad-core
Computer Language Benchmarks Game      [[ Help ]]

- all benchmarks - n-body fannkuch-redux meteor-contest fasta fasta-redux spectral-norm reverse-complement mandelbrot k-nucleotide regex-dna pidigits chameneos-redux thread-ring binary-trees - all languages - Ada 2005 GNAT ATS C GNU gcc Clojure C# Mono C++ GNU g++ Erlang HiPE F# Mono Fortran Intel Go Haskell GHC Java 7 -server Lisp SBCL OCaml Pascal Free Pascal Perl PHP Python 3 Racket Ruby 1.9 Ruby JRuby Scala

÷ Ada 2005 GNAT ATS C GNU gcc Clojure C# Mono C++ GNU g++ Erlang HiPE F# Mono Fortran Intel Go Haskell GHC Java 7 -server Lisp SBCL OCaml Pascal Free Pascal Perl PHP Python 3 Racket Ruby 1.9 Ruby JRuby Scala

 Step 1 : Are the C++ GNU g++ programs faster? At a glance.

This chart shows 3 comparisons - Time-used, Memory-used and Code-used ~ speed and size.

Each chart bar shows, for one unidentified benchmark, how much the fastest C++ GNU g++ program used compared to the fastest C GNU gcc program.

Look at speed another way - look at a box plot of Time-used data.

 Step 2 : Are the C++ GNU g++ programs faster? Approximately.

This table shows 3 comparisons - Time-used, Memory-used and Code-used ~ speed and size.

Each table row shows, for one named benchmark, how much the fastest C++ GNU g++ program used compared to the fastest C GNU gcc program.

C++ GNU g++ used what fraction? used how many times more?
Benchmark	Time	Memory	Code
k-nucleotide	1/4	±	±
spectral-norm	±	±	±
n-body	±	±	±
reverse-complement	±	1/2	±
pidigits	±	±	±
mandelbrot	±	±	±
binary-trees	±	2×	±
fannkuch-redux	±	3×	±
fasta	±	±	±
regex-dna	2×	1/2	1/4
fasta-redux	2×	2×	±

C++ GNU g++ used what fraction? used how many times more?
Time-used	|-	|---	25%	median	75%	---|	-|
(Elapsed secs)	1/4	1/2	±	±	±	2×	2×

± read the measurements and then read the program source code.

 Step 3 : Are the C++ GNU g++ programs faster? Measurements.

This table shows 5 measurements - CPU Time, Elapsed Time, Memory, Code and ≈ CPU Load ~ speed and size.

For each named benchmark, measurements of the fastest C++ GNU g++ program are shown for comparison against measurements of the fastest C GNU gcc program.

Program Source Code	CPU secs	Elapsed secs	Memory KB	Code B	≈ CPU Load
k-nucleotide
C++ GNU g++	12.13	3.65	132,052	3415	83% 81% 95% 76%
C GNU gcc	40.96	15.63	153,640	2280	95% 34% 100% 34%
spectral-norm
C++ GNU g++	10.03	2.52	388	1044	100% 100% 100% 100%
C GNU gcc	10.25	2.58	384	1139	100% 100% 100% 100%
n-body
C++ GNU g++	20.13	20.14	320	1659	0% 0% 100% 0%
C GNU gcc	20.45	20.45	320	1173	0% 0% 0% 100%
reverse-complement
C++ GNU g++	1.25	0.86	245,456	2275	51% 15% 33% 49%
C GNU gcc	1.17	0.86	496,936	1867	1% 25% 26% 88%
pidigits
C++ GNU g++	2.76	2.76	1,452	682	0% 0% 100% 0%
C GNU gcc	2.75	2.76	1,124	541	0% 0% 100% 0%
mandelbrot
C++ GNU g++	23.74	5.97	32,096	1017	99% 99% 99% 100%
C GNU gcc	23.33	5.84	27,472	799	100% 100% 100% 100%
binary-trees
C++ GNU g++	17.07	5.78	178,988	892	90% 71% 77% 59%
C GNU gcc	13.70	5.48	100,232	850	24% 74% 79% 74%
fannkuch-redux
C++ GNU g++	61.42	15.77	1,020	1439	100% 97% 97% 96%
C GNU gcc	52.88	13.72	328	1557	97% 91% 98% 100%
fasta
C++ GNU g++	6.30	6.31	288	1266	0% 0% 100% 0%
C GNU gcc	4.92	4.92	288	1221	0% 0% 0% 100%
regex-dna
C++ GNU g++	6.00	4.45	174,392	695	33% 2% 100% 1%
C GNU gcc	6.18	2.72	286,664	2579	65% 45% 48% 73%
fasta-redux
C++ GNU g++	2.93	2.94	616	1474	1% 0% 0% 100%
C GNU gcc	1.68	1.69	288	1321	0% 1% 99% 1%

 Step 4 : Are there other C++ GNU g++ programs for these benchmarks?

Remember - those are just the fastest C++ GNU g++ and C GNU gcc programs measured on this OS/machine. Check if there are other implementations of these benchmark programs for C++ GNU g++.

Ada 2005 GNAT ATS C GNU gcc Clojure C# Mono C++ GNU g++ Erlang HiPE F# Mono Fortran Intel Go Haskell GHC Java 7 -server Lisp SBCL OCaml Pascal Free Pascal Perl PHP Python 3 Racket Ruby 1.9 Ruby JRuby Scala

Maybe one of those other C++ GNU g++ programs is fastest on a different OS/machine.

 Step 5 : Are there other faster programs for these benchmarks?

Remember - those are just the fastest C++ GNU g++ and C GNU gcc programs measured on this OS/machine. Check if there are faster implementations of these benchmark programs for other programming languages.

n-body fannkuch-redux meteor-contest fasta fasta-redux spectral-norm reverse-complement mandelbrot k-nucleotide regex-dna pidigits chameneos-redux thread-ring binary-trees

Maybe one of those other programs is fastest on a different OS/machine.

 C++ GNU g++ : c plus objects plus generics 

C++ 1991-2006, Bjarne Stroustrup (pdf)

gcc version 4.6.3 (Ubuntu/Linaro 4.6.3-1ubuntu5)

Home Page: http://gcc.gnu.org/

Download: ftp://ftp.gnu.org/pub/gnu/gcc/

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