arel_renaming_benchmark.rb

require "benchmark"

n = 100000

klass = Benchmark

Benchmark.bm do |b|
  b.report do
    n.times { "visit_#{(klass.name || '').gsub('::', '_')}" }
  end
  
  b.report do
    n.times { "visit_#{(klass.name || '').gsub('::', '_').gsub(/([A-Z]+)([A-Z][a-z])/,'\1_\2').gsub(/([a-z\d])([A-Z])/,'\1_\2').downcase}" }
  end
end

#      user     system      total        real
#  0.260000   0.000000   0.260000 (  0.271001)
#  0.510000   0.000000   0.510000 (  0.511426)