bench/bench_constantize.rb

   1
   2 def constantize_full(camel_cased_word)
   3   unless /\A(?:::)?([A-Z]\w*(?:::[A-Z]\w*)*)\z/ =~ camel_cased_word
   4     raise NameError, "#{camel_cased_word.inspect} is not a valid constant name!"
   5   end
   6
   7   Object.module_eval("::#{$1}", __FILE__, __LINE__)
   8 end
   9
  10 def constantize_no_re(camel_cased_word)
  11   Object.module_eval("::#{camel_cased_word}", __FILE__, __LINE__)
  12 end
  13
  14 def constantize_no_eval(camel_cased_word)
  15   unless /\A(?:::)?([A-Z]\w*(?:::[A-Z]\w*)*)\z/ =~ camel_cased_word
  16     raise NameError, "#{camel_cased_word.inspect} is not a valid constant name!"
  17   end
  18 end
  19
  20 require 'benchmark'
  21
  22 Integer(ARGV[0] || 10).times do
  23   Benchmark.bm(30) do |bm|
  24     bm.report("constantize_full(\"Hash\")") { 500_000.times { constantize_full("Hash") }}
  25     bm.report("constantize_no_re(\"Hash\")") { 500_000.times { constantize_no_re("Hash") }}
  26     bm.report("constantize_no_eval(\"Hash\")") { 500_000.times { constantize_no_eval("Hash") }}
  27   end
  28 end