RDocPerformance

RDoc has generally been used as the primary measure of general-purpose performance in JRuby, since it involves extremely heavy interpreted code and since it performs rather poorly under JRuby currently.

Profiling output from gem install rake

This output is from running a gem install rake (local) with RDoc/RI generation and profiling enabled. It can be used to help work on improving JRuby performance.

  %   cumulative   self              self     total
 time   seconds   seconds    calls  ms/call  ms/call  name
 12.42    56.41     56.41    37464     1.51     2.37  RubyToken.Token
  6.65    86.62     30.21    60000     0.50     5.78  IRB::SLex::Node#match_io
  4.68   107.90     21.28   233778     0.09     0.09  RubyLex::BufferedReader#getc
  4.42   128.00     20.10    80126     0.25     3.34  RDoc::RubyParser#get_tk
  4.00   146.16     18.16   207562     0.09     0.18  RubyLex#getc
  3.91   163.94     17.78     1201    14.81    36.71  SM::AttributeManager#convert_specials
  3.04   177.76     13.83   132797     0.10     0.10  Range#each
  2.97   191.27     13.51     8538     1.58     6.11  RubyLex#identify_identifier
  2.91   204.51     13.24   626767     0.02     0.02  Kernel.==
  2.90   217.67     13.15    33784     0.39     7.02  RubyLex#token
  2.79   230.32     12.66   130162     0.10     0.20  SM::AttrSpan#set_attrs
  2.53   241.84     11.51      580    19.85  1639.52  RDoc::RubyParser#parse_statements
  2.23   251.97     10.13     1201     8.44    12.47  SM::AttributeManager#split_into_flow
  1.76   259.95      7.99    24006     0.33     9.94  RDoc::RubyParser#skip_tkspace
  1.65   267.45      7.50     1166     6.43    29.16  TemplatePage#substitute_into
  1.42   273.91      6.45     1856     3.48    13.22  RubyLex#identify_comment
  1.40   280.26      6.35     5678     1.12     1.68  #<Class:JavaUtilities>#matching_method
  1.23   285.84      5.59    36736     0.15     0.37  IRB::Notifier::LeveledNotifier#notify?
  1.17   291.14      5.30   239335     0.02     0.02  Kernel.hash
  1.06   295.98      4.84    54864     0.09     0.14  RubyLex#ungetc
  1.02   300.61      4.63   202748     0.02     0.02  Kernel.is_a?
  1.00   305.14      4.53    46342     0.10     0.12  RDoc::RubyParser#unget_tk

Here is the same output under Ruby 1.8.5 on OS X:

  %   cumulative   self              self     total
 time   seconds   seconds    calls  ms/call  ms/call  name
 10.65   115.46    115.46   233778     0.49     0.65  RubyLex::BufferedReader#getc
  4.83   167.82     52.36   175207     0.30    24.57  Array#each
  4.15   212.84     45.02     1201    37.49    86.34  SM::AttributeManager#split_into_flow
  3.65   252.47     39.63    80126     0.49     6.67  RDoc::RubyParser#get_tk
  3.54   290.81     38.34    13271     2.89    13.03  Hash#each
  3.27   326.32     35.51    60000     0.59    11.40  IRB::SLex::Node#match_io
  2.98   358.68     32.36   926916     0.03     0.03  String#==
  2.91   390.29     31.61    40440     0.78     2.41  Hash#each_value
  2.13   413.34     23.05     8538     2.70    12.23  RubyLex#identify_identifier
  1.82   433.05     19.71     1856    10.62    44.87  RubyLex#identify_comment
  1.73   451.82     18.77      580    32.36  3264.64  RDoc::RubyParser#parse_statements
  1.69   470.10     18.28   207562     0.09     0.74  RubyLex#getc
  1.67   488.18     18.08    37464     0.48     1.73  RubyToken.Token
  1.62   505.80     17.62   551810     0.03     0.03  Module#===
  1.55   522.64     16.84    54864     0.31     0.44  RubyLex::BufferedReader#ungetc
  1.53   539.19     16.55    33938     0.49     0.82  Array#&
  1.52   555.69     16.50   479047     0.03     0.03  Fixnum#==
  1.38   570.70     15.01    39503     0.38     9.25  Proc#call
  1.31   584.86     14.16   410340     0.03     0.03  Fixnum#<
  1.30   599.00     14.14    33784     0.42    13.61  RubyLex#token
  1.30   613.08     14.08   466655     0.03     0.03  String#[]
  1.18   625.85     12.77   402553     0.03     0.03  Fixnum#+
  1.15   638.32     12.47   119803     0.10     0.13  SM::AttrSpan#[]
  1.11   650.33     12.01    46342     0.26     0.51  RDoc::RubyParser#unget_tk