gistfile1.txt

aotearoa:jruby_test$ unset JRUBY_OPTS
aotearoa:jruby_test$ cat jruby-shebang.rb 
#!/usr/bin/env jruby -J-Djruby.debug.loadService.timing=true

require 'rubygems'
aotearoa:jruby_test$ ./jruby-shebang.rb 
  -> builtin/core_ext/symbol
  <- builtin/core_ext/symbol - 38ms
  -> enumerator
  <- enumerator - 4ms
  -> rubygems
    -> rubygems/defaults
    <- rubygems/defaults - 4ms
    -> thread
    <- thread - 5ms
    -> etc
    <- etc - 8ms
    -> rbconfig
    <- rbconfig - 117ms
    -> rubygems/exceptions
    <- rubygems/exceptions - 5ms
    -> rubygems/version
    <- rubygems/version - 20ms
    -> rubygems/requirement
      -> rubygems/version
      <- rubygems/version - 0ms
    <- rubygems/requirement - 10ms
    -> rubygems/dependency
      -> rubygems/requirement
      <- rubygems/requirement - 0ms
    <- rubygems/dependency - 10ms
    -> rubygems/gem_path_searcher
    <- rubygems/gem_path_searcher - 5ms
    -> rubygems/source_index
      -> rubygems/user_interaction
      <- rubygems/user_interaction - 15ms
      -> rubygems/specification
        -> rubygems/version
        <- rubygems/version - 1ms
        -> rubygems/requirement
        <- rubygems/requirement - 0ms
        -> rubygems/platform
        <- rubygems/platform - 10ms
      <- rubygems/specification - 130ms
    <- rubygems/source_index - 183ms
    -> rubygems/platform
    <- rubygems/platform - 0ms
    -> rubygems/builder
    <- rubygems/builder - 27ms
    -> rubygems/defaults/operating_system
    <- rubygems/defaults/operating_system - 22ms
    -> rubygems/defaults/jruby
      -> rubygems/config_file
        -> Win32API
          -> rbconfig
          <- rbconfig - 0ms
        <- Win32API - 8ms
      <- rubygems/config_file - 27ms
      -> rubygems/source_index
      <- rubygems/source_index - 0ms
      -> rubygems/defaults/jruby_native
      <- rubygems/defaults/jruby_native - 1ms
    <- rubygems/defaults/jruby - 171ms
    -> rubygems/config_file
    <- rubygems/config_file - 1ms
    -> rubygems/custom_require
      -> rubygems
      <- rubygems - 1ms
    <- rubygems/custom_require - 17ms
    -> yaml
      -> stringio
      <- stringio - 7ms
      -> yaml/compat
      <- yaml/compat - 2ms
      -> yaml/error
      <- yaml/error - 2ms
      -> yaml/yecht
        -> yecht
        <- yecht - 95ms
        -> yaml/basenode
          -> yaml/ypath
          <- yaml/ypath - 3ms
        <- yaml/basenode - 11ms
      <- yaml/yecht - 108ms
      -> yaml/tag
      <- yaml/tag - 3ms
      -> yaml/stream
      <- yaml/stream - 2ms
      -> yaml/constants
      <- yaml/constants - 3ms
      -> yaml/rubytypes
        -> date
          -> rational
          <- rational - 31ms
          -> date/format
            -> rational
            <- rational - 0ms
          <- date/format - 210ms
        <- date - 574ms
        -> yaml/compat
        <- yaml/compat - 0ms
      <- yaml/rubytypes - 671ms
      -> yaml/types
        -> yaml/compat
        <- yaml/compat - 1ms
      <- yaml/types - 12ms
    <- yaml - 832ms
    -> jruby/util
    <- jruby/util - 3ms
  <- rubygems - 2325ms
aotearoa:jruby_test$ rvm use jruby-1.4.0

Now using jruby 1.4.0

aotearoa:jruby_test$ ./jruby-shebang.rb 
aotearoa:jruby_test$