Concordance Test.rb

require 'benchmark'

str = "1 2 3 4-5 6 7 8-9"
Benchmark.bm do |bm|
	bm.report("split: ") {10000.times do hash = Hash.new(0); str.split.each { |m| hash[m] += 1}; end }
	bm.report("scan: (\\w+) ") { 10000.times do hash = Hash.new(0); str.scan(/\w+/m) { |m| hash[m] += 1} end }
	bm.report("scan: (\w+(-\w+)?) ") { 10000.times do hash = Hash.new(0); str.scan(/(\w+(-\w+)?)/m) { |m| hash[m] += 1} end }
end

## Native environment tests - 1.8.7
#Creating one hash and clear it: (hash.clear instead of hash = Hash.new(0))
#                     user     system      total        real
# split:            0.490000   0.150000   0.640000 (  0.656165)
# scan: (\w+)       0.800000   0.180000   0.980000 (  1.003529)
# scan: (w+(-w+)?)  1.390000   0.340000   1.730000 (  1.745792)

#Creating a new hash every time:
#                     user     system      total        real
# split:            0.470000   0.140000   0.610000 (  0.643760)
# scan: (\w+)       0.800000   0.180000   0.980000 (  0.989383)
# scan: (w+(-w+)?)  1.170000   0.260000   1.430000 (  1.457280)

## Variety tests by Stef Penner
#mbp:rubinius stefan$ ruby -v
# -> ruby 1.8.7 (2008-06-20 patchlevel 22) [i686-darwin9.3.0]
#mbp:rubinius stefan$ macruby -v
# -> MacRuby version 0.3 (ruby 1.9.0 2008-06-03) [universal-darwin9.0]
#mbp:rubinius stefan$ jruby -v
# -> ruby 1.8.6 (2008-06-22 rev 6555) [i386-jruby1.1.1]
#mbp:rubinius stefan$ rbx -v
# -> rubinius 0.9.0 (ruby 1.8.6 compatible) (8038487c4) (10/19/2008) [i686-apple-darwin9.5.0]

# $ rubinous regx.rb 
#                   user     system      total        real
# split:           1.422384   0.000000   1.422384 (  1.422366)
# scan: (\w+)      1.458300   0.000000   1.458300 (  1.458299)
# scan: (w+(-w+)?) 2.127930   0.000000   2.127930 (  2.127929)

# $ ruby regx.rb
#                   user     system      total        real
# split:           0.410000   0.140000   0.550000 (  0.559599)
# scan: (\w+)      0.670000   0.180000   0.850000 (  0.862585)
# scan: (w+(-w+)?) 0.990000   0.270000   1.260000 (  1.268065)

# $ ruby1.9 regx.rb
#                   user     system      total        real
# split:           0.090000   0.000000   0.090000 (  0.096752)
# scan: (\w+)      0.170000   0.000000   0.170000 (  0.164321)
# scan: (w+(-w+)?) 0.280000   0.000000   0.280000 (  0.291374)

# $ macruby regx.rb
#                   user     system      total        real
# split:           0.440000   0.030000   0.470000 (  0.490660)
# scan: (\w+)      4.310000   0.050000   4.360000 (  4.449849)
# scan: (w+(-w+)?) 4.380000   0.040000   4.420000 (  4.503897)

# $ jruby regx.rb
#                   user     system      total        real
# split:           0.456000   0.000000   0.456000 (  0.456000)
# scan: (\w+)      0.261000   0.000000   0.261000 (  0.260000)
# scan: (w+(-w+)?) 0.369000   0.000000   0.369000 (  0.369000)