jruby

$ time jruby -S rake -T
rake about              # List versions of all Rails frameworks and the env...
rake db:create          # Create the database from config/database.yml for ...
rake db:drop            # Drops the database for the current Rails.env (use...
rake db:fixtures:load   # Load fixtures into the current environment's data...
rake db:migrate         # Migrate the database (options: VERSION=x, VERBOSE...
rake db:migrate:status  # Display status of migrations
rake db:rollback        # Rolls the schema back to the previous version (sp...
rake db:schema:dump     # Create a db/schema.rb file that can be portably u...
rake db:schema:load     # Load a schema.rb file into the database
rake db:seed            # Load the seed data from db/seeds.rb
rake db:setup           # Create the database, load the schema, and initial...
rake db:structure:dump  # Dump the database structure to a SQL file
rake db:version         # Retrieves the current schema version number
rake doc:app            # Generate docs for the app -- also availble doc:ra...
rake log:clear          # Truncates all *.log files in log/ to zero bytes
rake middleware         # Prints out your Rack middleware stack
rake notes              # Enumerate all annotations (use notes:optimize, :f...
rake notes:custom       # Enumerate a custom annotation, specify with ANNOT...
rake rails:template     # Applies the template supplied by LOCATION=/path/t...
rake rails:update       # Update both configs and public/javascripts from R...
rake routes             # Print out all defined routes in match order, with...
rake secret             # Generate a crytographically secure secret key (th...
rake stats              # Report code statistics (KLOCs, etc) from the appl...
rake test               # Runs test:unit, test:functional, test:integration...
rake test:recent        # Run tests for recenttest:prepare / Test recent ch...
rake test:uncommitted   # Run tests for uncommittedtest:prepare / Test chan...
rake time:zones:all     # Displays all time zones, also available: time:zon...
rake tmp:clear          # Clear session, cache, and socket files from tmp/ ...
rake tmp:create         # Creates tmp directories for sessions, cache, sock...

real	0m3.511s
user	0m3.464s
sys	0m0.332s

jruby-complete

$ time java -jar jruby-complete-1.5.1.jar -S rake -T
rake about              # List versions of all Rails frameworks and the env...
rake db:create          # Create the database from config/database.yml for ...
rake db:drop            # Drops the database for the current Rails.env (use...
rake db:fixtures:load   # Load fixtures into the current environment's data...
rake db:migrate         # Migrate the database (options: VERSION=x, VERBOSE...
rake db:migrate:status  # Display status of migrations
rake db:rollback        # Rolls the schema back to the previous version (sp...
rake db:schema:dump     # Create a db/schema.rb file that can be portably u...
rake db:schema:load     # Load a schema.rb file into the database
rake db:seed            # Load the seed data from db/seeds.rb
rake db:setup           # Create the database, load the schema, and initial...
rake db:structure:dump  # Dump the database structure to a SQL file
rake db:version         # Retrieves the current schema version number
rake doc:app            # Generate docs for the app -- also availble doc:ra...
rake log:clear          # Truncates all *.log files in log/ to zero bytes
rake middleware         # Prints out your Rack middleware stack
rake notes              # Enumerate all annotations (use notes:optimize, :f...
rake notes:custom       # Enumerate a custom annotation, specify with ANNOT...
rake rails:template     # Applies the template supplied by LOCATION=/path/t...
rake rails:update       # Update both configs and public/javascripts from R...
rake routes             # Print out all defined routes in match order, with...
rake secret             # Generate a crytographically secure secret key (th...
rake stats              # Report code statistics (KLOCs, etc) from the appl...
rake test               # Runs test:unit, test:functional, test:integration...
rake test:recent        # Run tests for recenttest:prepare / Test recent ch...
rake test:uncommitted   # Run tests for uncommittedtest:prepare / Test chan...
rake time:zones:all     # Displays all time zones, also available: time:zon...
rake tmp:clear          # Clear session, cache, and socket files from tmp/ ...
rake tmp:create         # Creates tmp directories for sessions, cache, sock...

real	0m8.544s
user	0m12.653s
sys	0m0.600s

jruby-complete with bootclasspath

$ time java -Xbootclasspath/a:jruby-complete-1.5.1.jar -jar jruby-complete-1.5.1.jar -S rake -T
rake about              # List versions of all Rails frameworks and the env...
rake db:create          # Create the database from config/database.yml for ...
rake db:drop            # Drops the database for the current Rails.env (use...
rake db:fixtures:load   # Load fixtures into the current environment's data...
rake db:migrate         # Migrate the database (options: VERSION=x, VERBOSE...
rake db:migrate:status  # Display status of migrations
rake db:rollback        # Rolls the schema back to the previous version (sp...
rake db:schema:dump     # Create a db/schema.rb file that can be portably u...
rake db:schema:load     # Load a schema.rb file into the database
rake db:seed            # Load the seed data from db/seeds.rb
rake db:setup           # Create the database, load the schema, and initial...
rake db:structure:dump  # Dump the database structure to a SQL file
rake db:version         # Retrieves the current schema version number
rake doc:app            # Generate docs for the app -- also availble doc:ra...
rake log:clear          # Truncates all *.log files in log/ to zero bytes
rake middleware         # Prints out your Rack middleware stack
rake notes              # Enumerate all annotations (use notes:optimize, :f...
rake notes:custom       # Enumerate a custom annotation, specify with ANNOT...
rake rails:template     # Applies the template supplied by LOCATION=/path/t...
rake rails:update       # Update both configs and public/javascripts from R...
rake routes             # Print out all defined routes in match order, with...
rake secret             # Generate a crytographically secure secret key (th...
rake stats              # Report code statistics (KLOCs, etc) from the appl...
rake test               # Runs test:unit, test:functional, test:integration...
rake test:recent        # Run tests for recenttest:prepare / Test recent ch...
rake test:uncommitted   # Run tests for uncommittedtest:prepare / Test chan...
rake time:zones:all     # Displays all time zones, also available: time:zon...
rake tmp:clear          # Clear session, cache, and socket files from tmp/ ...
rake tmp:create         # Creates tmp directories for sessions, cache, sock...

real	0m7.045s
user	0m10.861s
sys	0m0.584s