Fork of delete-tr.rb run in 2013, comparing Rubinius against MRI

delete-tr.rb

require 'benchmark'

TIMES = 1000

s = "a long string" * 1000

Benchmark.bmbm do |x|
  x.report("delete") do
    TIMES.times { s.delete(" ") }
  end

  x.report("tr") do
    TIMES.times { s.tr(" ", "") }
  end

  x.report("gsub with regexp") do
    TIMES.times { s.gsub(/ /, "") }
  end

  x.report("gsub with string") do
    TIMES.times { s.gsub(" ", "") }
  end
end

# Under MRI 2.0.0-p247
# ruby 2.0.0p247 (2013-06-27 revision 41674) [x86_64-darwin11.4.2]
# Rehearsal ----------------------------------------------------
# delete             0.030000   0.010000   0.040000 (  0.032588)
# tr                 0.030000   0.000000   0.030000 (  0.029961)
# gsub with regexp   0.670000   0.000000   0.670000 (  0.670667)
# gsub with string   0.670000   0.000000   0.670000 (  0.673313)
# ------------------------------------------- total: 1.410000sec
#
# user     system      total        real
# delete             0.040000   0.000000   0.040000 (  0.032628)
# tr                 0.030000   0.000000   0.030000 (  0.032721)
# gsub with regexp   0.690000   0.000000   0.690000 (  0.697010)
# gsub with string   0.670000   0.000000   0.670000 (  0.671953)

# Under rbx
# rubinius 2.0.0.n204 (1.9.3 97416082 2013-07-23 JI) [x86_64-apple-darwin11.4.2]
# Rehearsal ----------------------------------------------------
# delete             0.223000   0.003194   0.226194 (  0.189438)
# tr                 0.153779   0.000554   0.154333 (  0.154239)
# gsub with regexp   1.289229   0.012082   1.301311 (  1.008253)
# gsub with string   0.806960   0.006720   0.813680 (  0.809855)
# ------------------------------------------- total: 2.495518sec
#
# user     system      total        real
# delete             0.149678   0.000271   0.149949 (  0.149861)
# tr                 0.149242   0.000271   0.149513 (  0.149397)
# gsub with regexp   0.798716   0.006516   0.805232 (  0.801440)
# gsub with string   0.814010   0.007074   0.821084 (  0.817623)