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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 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 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×	±
binary-trees	1/2	1/2	±
fasta-redux	±	1/3	±
fasta	±	±	±
mandelbrot	±	±	±
pidigits	±	1/2	±
fannkuch-redux	±	1/3	±
reverse-complement	±	2×	±
spectral-norm	±	±	±
n-body	±	±	±
k-nucleotide	5×	±	±

C GNU gcc used what fraction? used how many times more?
Time-used	|-	|---	25%	median	75%	---|	-|
(Elapsed secs)	1/2	1/2	±	±	±	±	5×

± 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	5.90	2.60	306,884	2579	43% 66% 74% 49%
C++ GNU g++	15.70	5.03	90,944	1759	90% 89% 76% 57%
binary-trees
C GNU gcc	13.09	5.44	150,720	850	94% 46% 66% 34%
C++ GNU g++	27.51	9.04	360,536	892	96% 85% 66% 60%
fasta-redux
C GNU gcc	1.68	1.68	332	1321	0% 1% 1% 100%
C++ GNU g++	2.00	2.00	1,008	1474	0% 0% 100% 1%
fasta
C GNU gcc	5.85	5.85	332	1221	0% 1% 100% 0%
C++ GNU g++	6.19	6.20	332	1266	0% 0% 0% 100%
mandelbrot
C GNU gcc	23.49	5.88	27,008	799	100% 100% 100% 100%
C++ GNU g++	24.31	6.11	32,228	1017	100% 100% 100% 100%
pidigits
C GNU gcc	2.29	2.29	896	541	2% 0% 0% 100%
C++ GNU g++	2.29	2.30	1,580	682	0% 0% 1% 100%
fannkuch-redux
C GNU gcc	49.50	12.71	368	1557	100% 95% 98% 99%
C++ GNU g++	48.54	12.44	1,164	1440	100% 100% 93% 98%
reverse-complement
C GNU gcc	1.02	0.73	476,108	1867	28% 0% 88% 29%
C++ GNU g++	1.07	0.69	245,668	2275	20% 16% 42% 88%
spectral-norm
C GNU gcc	10.66	2.67	688	1139	100% 100% 100% 100%
C++ GNU g++	10.03	2.52	688	1044	100% 100% 100% 100%
n-body
C GNU gcc	20.72	20.73	328	1429	0% 0% 100% 0%
C++ GNU g++	19.35	19.36	356	1659	0% 0% 0% 100%
k-nucleotide
C GNU gcc	43.67	16.61	180,352	2280	34% 38% 100% 95%
C++ GNU g++	11.62	3.35	138,544	3415	83% 81% 86% 98%

 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 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/

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