x64 Ubuntu : Intel® Q6600® quad-core
Computer Language Benchmarks Game      [[ Play ]]

- 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-redux binary-trees - all languages - Ada 2005 GNAT ATS C gcc Clojure C# Mono C++ g++ Dart Erlang Erlang HiPE F# Mono Fortran Intel Go Haskell GHC Java 7 Lisp SBCL OCaml Pascal Free Pascal Perl PHP Python 3 Racket Ruby 2.0 Ruby JRuby Scala x86 one core x64 quad-core x86 quad-core x64 one core

 performance measurements

Each table row shows performance measurements for this Ruby JRuby program with a particular command-line input value N.

N	CPU secs	Elapsed secs	Memory KB	Code B	≈ CPU Load
500	8.23	5.36	599,112	292	4% 26% 93% 32%
3,000	93.13	90.02	613,116	292	0% 2% 49% 53%
5,500	315.39	311.63	625,052	292	1% 1% 29% 71%

Read the ↓ make, command line, and program output logs to see how this program was run.

Read spectral-norm benchmark to see what this program should do.

 notes

jruby 1.7.3 (1.9.3p385) 2013-02-21 dac429b on Java HotSpot(TM) 64-Bit Server VM 1.7.0_11-b21 [linux-amd64]

 spectral-norm Ruby JRuby program source code

# The Computer Language Benchmarks Game
# http://benchmarksgame.alioth.debian.org/
# Contributed by Sokolov Yura

def eval_A(i,j)
	return 1.0/((i+j)*(i+j+1)/2+i+1)
end

def eval_A_times_u(u)
        v, i = nil, nil
	(0..u.length-1).collect { |i|
                v = 0
		for j in 0..u.length-1
			v += eval_A(i,j)*u[j]
                end
                v
        }
end

def eval_At_times_u(u)
	v, i = nil, nil
	(0..u.length-1).collect{|i|
                v = 0
		for j in 0..u.length-1
			v += eval_A(j,i)*u[j]
                end
                v
        }
end

def eval_AtA_times_u(u)
	return eval_At_times_u(eval_A_times_u(u))
end

n = ARGV[0].to_i
u=[1]*n
for i in 1..10
        v=eval_AtA_times_u(u)
        u=eval_AtA_times_u(v)
end
vBv=0
vv=0
for i in 0..n-1
        vBv += u[i]*v[i]
        vv += v[i]*v[i]
end
print "%0.9f" % (Math.sqrt(vBv/vv)), "\n"

 make, command-line, and program output logs

Sat, 20 Apr 2013 00:35:45 GMT

MAKE:
mv spectralnorm.jruby spectralnorm.rb
0.02s to complete and log all make actions

COMMAND LINE:
/usr/local/src/jruby-1.7.3/bin/jruby -Xcompile.invokedynamic=true -J-server -J-Xmn512m -J-Xms2048m -J-Xmx2048m spectralnorm.rb 5500

PROGRAM OUTPUT:
1.274224153

  Home   Conclusions   License   Play