From: Dave Thomas <redmine@...>
Date: 2008-06-16T08:12:35+09:00
Subject: [ruby-core:17261] [Ruby 1.9 - Bug #161] (Open) Profile library seems broken in 1.9 15427cat t.rv

Issue #161 has been reported by Dave Thomas.

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Bug #161: Profile library seems broken in 1.9 15427cat t.rv
http://redmine.ruby-lang.org/issues/show/161

Author: Dave Thomas
Status: Open
Priority: Normal
Assigned to: 
Category: 
Target version: 


dave[RUBY3/Book 18:11:11*] cat t.rb
    require 'profile'
    def ackerman(m, n)
      if m == 0 then  n+1
      elsif n == 0 and m > 0 then ackerman(m-1, 1)
      else ackerman(m-1, ackerman(m, n-1))
      end
    end
    ackerman(3, 3)

With 1.8:

 dave[RUBY3/Book 18:11:36*] /usr/bin/ruby -v t.rb
 ruby 1.8.6 (2007-09-24 patchlevel 111) [universal-darwin9.0]
  %   cumulative   self              self     total
 time   seconds   seconds    calls  ms/call  ms/call  name
 72.97     0.27      0.27     2432     0.11     4.65  Object#ackerman
 13.51     0.32      0.05     3676     0.01     0.01  Fixnum#==
 10.81     0.36      0.04     2431     0.02     0.02  Fixnum#-
  2.70     0.37      0.01     1188     0.01     0.01  Fixnum#+
  0.00     0.37      0.00        1     0.00     0.00  Module#method_added
  0.00     0.37      0.00       57     0.00     0.00  Fixnum#>
  0.00     0.37      0.00        1     0.00   370.00  #toplevel
 
With 1.9:

 dave[RUBY3/Book 18:11:40*] ruby -v t.rb         
 ruby 1.9.0 (2008-06-16 revision 15427) [i686-darwin9.3.0]
  %   cumulative   self              self     total
 time   seconds   seconds    calls  ms/call  ms/call  name
  0.00     0.00      0.00        1     0.00     0.00  Module#method_added
  0.00     0.01      0.00        1     0.00    10.00  #toplevel


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