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 Java 7 averaged 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 Java 7 averaged Lisp SBCL OCaml Pascal Free Pascal Perl PHP Python 3 Racket Ruby 1.9 Ruby JRuby Scala

 Step 1 : Are the C GNU gcc 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 gcc program used compared to the fastest C++ GNU g++ program.

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

 Step 2 : Are the C GNU gcc 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 gcc program used compared to the fastest C++ GNU g++ program.

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

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

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

 Step 3 : Are the C GNU gcc 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 gcc program are shown for comparison against measurements of the fastest C++ GNU g++ program.

Program Source Code	CPU secs	Elapsed secs	Memory KB	Code B	≈ CPU Load
regex-dna
C GNU gcc	6.42	2.90	288,040	2579	44% 45% 75% 69%
C++ GNU g++	17.06	5.79	94,896	1759	74% 60% 64% 100%
fasta-redux
C GNU gcc	1.68	1.69	256	1321	0% 100% 0% 1%
C++ GNU g++	2.94	2.94	580	1474	1% 0% 0% 100%
fasta
C GNU gcc	4.92	4.93	256	1221	0% 0% 0% 100%
C++ GNU g++	6.31	6.31	256	1266	0% 100% 0% 0%
binary-trees
C GNU gcc	12.81	4.85	100,460	850	23% 82% 95% 63%
C++ GNU g++	16.92	5.91	173,424	892	67% 90% 69% 58%
mandelbrot
C GNU gcc	23.34	5.85	27,452	799	100% 100% 100% 100%
C++ GNU g++	23.75	5.97	32,060	1017	99% 100% 99% 99%
pidigits
C GNU gcc	2.74	2.74	1,092	541	0% 0% 0% 100%
C++ GNU g++	2.74	2.75	1,680	682	0% 100% 0% 0%
reverse-complement
C GNU gcc	1.16	0.87	496,900	1867	24% 26% 0% 89%
C++ GNU g++	1.27	0.87	245,432	2275	51% 21% 39% 43%
n-body
C GNU gcc	20.46	20.47	284	1173	0% 0% 0% 100%
C++ GNU g++	20.15	20.15	284	1659	0% 0% 0% 100%
spectral-norm
C GNU gcc	10.25	2.58	608	1139	100% 100% 100% 100%
C++ GNU g++	10.04	2.52	608	1044	100% 100% 100% 100%
fannkuch-redux
C GNU gcc	54.47	14.28	292	1557	93% 95% 93% 100%
C++ GNU g++	47.99	12.23	952	1440	100% 96% 100% 98%
k-nucleotide
C GNU gcc	41.50	15.95	153,688	2280	36% 88% 96% 43%
C++ GNU g++	12.46	3.71	131,952	3415	79% 84% 80% 95%

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

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

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 Java 7 averaged Lisp SBCL OCaml Pascal Free Pascal Perl PHP Python 3 Racket Ruby 1.9 Ruby JRuby Scala

Maybe one of those other C GNU gcc 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 gcc and C++ GNU g++ 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 gcc : unchecked low-level programming 

gcc version 4.6.1 (Ubuntu/Linaro 4.6.1-9ubuntu3)

Online book: The C Book

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

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

  Home   Conclusions   License   Help