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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 Java 7 -server 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 Java 7 -server 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 Java 7 -server 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 Java 7 -server program used compared to the fastest C++ GNU g++ program.

Java 7 -server used what fraction? used how many times more?
Benchmark	Time	Memory	Code
fasta	±	53×	±
binary-trees	±	±	±
fannkuch-redux	±	15×	±
mandelbrot	±	2×	±
n-body	±	47×	±
fasta-redux	±	17×	±
pidigits	2×	39×	3×
regex-dna	2×	9×	1/2
spectral-norm	2×	25×	±
reverse-complement	2×	±	±
k-nucleotide	2×	3×	±

Java 7 -server used what fraction? used how many times more?
Time-used	|-	|---	25%	median	75%	---|	-|
(Elapsed secs)	±	±	±	±	2×	2×	2×

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

 Step 3 : Are the Java 7 -server 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 Java 7 -server 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
fasta
Java 7 -server	5.25	5.19	17,660	1507	0% 1% 2% 100%
C++ GNU g++	6.19	6.20	332	1266	0% 0% 0% 100%
binary-trees
Java 7 -server	18.01	8.55	534,924	1007	68% 92% 17% 36%
C++ GNU g++	27.51	9.04	360,536	892	96% 85% 66% 60%
fannkuch-redux
Java 7 -server	53.27	13.50	17,056	1282	98% 99% 98% 100%
C++ GNU g++	48.54	12.44	1,164	1440	100% 100% 93% 98%
mandelbrot
Java 7 -server	27.62	7.01	68,140	802	98% 99% 99% 99%
C++ GNU g++	24.31	6.11	32,228	1017	100% 100% 100% 100%
n-body
Java 7 -server	22.51	22.49	16,784	1424	0% 0% 0% 100%
C++ GNU g++	19.35	19.36	356	1659	0% 0% 0% 100%
fasta-redux
Java 7 -server	2.47	2.42	17,092	1443	1% 0% 100% 1%
C++ GNU g++	2.00	2.00	1,008	1474	0% 0% 100% 1%
pidigits
Java 7 -server	9.33	3.86	61,488	1808	55% 54% 58% 56%
C++ GNU g++	2.29	2.30	1,580	682	0% 0% 1% 100%
regex-dna
Java 7 -server	25.55	9.01	785,700	929	66% 76% 69% 75%
C++ GNU g++	15.70	5.03	90,944	1759	90% 89% 76% 57%
spectral-norm
Java 7 -server	17.68	4.53	17,264	950	97% 97% 98% 98%
C++ GNU g++	10.03	2.52	688	1044	100% 100% 100% 100%
reverse-complement
Java 7 -server	2.57	1.27	313,080	1661	45% 41% 33% 91%
C++ GNU g++	1.07	0.69	245,668	2275	20% 16% 42% 88%
k-nucleotide
Java 7 -server	29.91	8.17	458,476	2431	89% 91% 95% 93%
C++ GNU g++	11.62	3.35	138,544	3415	83% 81% 86% 98%

 Step 4 : Are there other Java 7 -server programs for these benchmarks?

Remember - those are just the fastest Java 7 -server and C++ GNU g++ programs measured on this OS/machine. Check if there are other implementations of these benchmark programs for Java 7 -server.

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 Java 7 -server programs is fastest on a different OS/machine.

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

Remember - those are just the fastest Java 7 -server 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.

 Java 7 -server : ubiquitous jit server virtual machine 

java version "1.7.0_02"
Java(TM) SE Runtime Environment (build 1.7.0_02-b13)
Java HotSpot(TM) 64-Bit Server VM (build 22.0-b10, mixed mode)

Home Page: Java SE at a Glance

Download: Java SE Downloads

See What about Java?

"Remember how HotSpot works. It starts by running your program with an interpreter. When it discovers that some method is "hot" -- that is, executed a lot, either because it is called a lot or because it contains loops that loop a lot -- it sends that method off to be compiled. After that one of two things will happen, either the next time the method is called the compiled version will be invoked (instead of the interpreted version) or the currently long running loop will be replaced, while still running, with the compiled method. The latter is known as "on stack replacement" and exists in the 1.3/1.4 HotSpot based systems."

Benchmarking the Java HotSpot VM

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