Keith Bennett keithrbennett
keithrbennett
/ jruby_java_benchmark_2013-121-1312.rb
Created
January 21, 2013 18:15
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| # Illustrates the overhead of the JRuby <--> Java bridge | |
| # parameter and return value type conversions, and the | |
| # dramatic performance improvement that can be had by | |
| # specifying the Java overload using java_method. | |
| require 'java' | |
| require 'benchmark' | |
| ITERATION_COUNT = ARGV.empty? ? 100_000 : ARGV.first.to_i | |
| JMath = java.lang.Math |
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| package com.affy; | |
| public class Bug { | |
| private int[] id; | |
| public Bug(int n) { | |
| id = new int[n]; | |
| for (int i = 0; i < n; i++) { | |
| id[i] = i; |
keithrbennett
/ gist:4956124
Created
February 14, 2013 20:30
Trying to use Chef omnibus installer on Linux Mint 14 32-bit VM...
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| user@linuxmint-14-32bit ~ $ uname -a | |
| Linux linuxmint-14-32bit 3.5.0-17-generic #28-Ubuntu SMP Tue Oct 9 19:32:08 UTC 2012 i686 i686 i686 GNU/Linux | |
| user@linuxmint-14-32bit ~ $ curl -L https://www.opscode.com/chef/install.sh | sudo bash | |
| % Total % Received % Xferd Average Speed Time Time Time Current | |
| Dload Upload Total Spent Left Speed | |
| 100 6471 100 6471 0 0 17436 0 --:--:-- --:--:-- --:--:-- 36150 | |
| Downloading Chef for linuxmint... | |
| Unable to retrieve a valid package! |
keithrbennett
/ thread_example.rb
Last active
December 14, 2015 04:09
Ruby script for comparing multithreaded operation in Ruby implementations (eg. Ruby vs. JRuby).
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| # Simple Ruby/JRuby program to illustrate that MRI Ruby uses only one CPU, | |
| # while JRuby will use all available CPU's. (Inspection tool not included; | |
| # you can use Activity Monitor on a Mac, or htop on many Unix distros. | |
| # | |
| # Keith R. Bennett, @keithrbennett | |
| NUM_THREADS = 5 | |
| SLEEP_DURATION_IN_SEC = 2 |
keithrbennett
/ locale_displayer.rb
Last active
December 14, 2015 04:09
Example JRuby program to display the JVM's available locales and their number, currency, and date formats. Change the format constants to see more kinds of formatting (e.g. DateFormat::LONG/SHORT). - Keith R. Bennett, @keithrbennett
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| # Example JRuby program to display the JVM's available locales | |
| # and their number, currency, and date formats. | |
| # | |
| # Keith R. Bennett, @keithrbennett | |
| require 'java' | |
| java_import 'java.util.Locale' | |
| java_import 'java.text.DateFormat' | |
| java_import 'java.text.NumberFormat' |
keithrbennett
/ gist:5556325
Created
May 10, 2013 18:20
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| ➜ ruby-validator git:(master) ✗ rspec x_spec.rb | |
| /Users/kbennett/work/small-projects/ruby-validator/x_spec.rb:2:in `require': cannot load such file -- logging (LoadError) | |
| from /Users/kbennett/work/small-projects/ruby-validator/x_spec.rb:2:in `<top (required)>' | |
| from /Users/kbennett/.rvm/gems/ruby-1.9.3-p392/gems/rspec-core-2.13.1/lib/rspec/core/configuration.rb:819:in `load' | |
| from /Users/kbennett/.rvm/gems/ruby-1.9.3-p392/gems/rspec-core-2.13.1/lib/rspec/core/configuration.rb:819:in `block in load_spec_files' | |
| from /Users/kbennett/.rvm/gems/ruby-1.9.3-p392/gems/rspec-core-2.13.1/lib/rspec/core/configuration.rb:819:in `each' | |
| from /Users/kbennett/.rvm/gems/ruby-1.9.3-p392/gems/rspec-core-2.13.1/lib/rspec/core/configuration.rb:819:in `load_spec_files' | |
| from /Users/kbennett/.rvm/gems/ruby-1.9.3-p392/gems/rspec-core-2.13.1/lib/rspec/core/command_line.rb:22:in `run' | |
| from /Users/kbennett/.rvm/gems/ruby-1.9.3-p392/gems/rspec-core-2.13.1/lib/rspec/core/runner.rb:80:in `run' | |
| from /Users/kbennett/.rvm/gems/ruby-1. |
keithrbennett
/ gist:5570290
Created
May 13, 2013 18:20
Output of JRuby RSpec test, after tests all pass. I'm calling a networking library during the tests, but don't know if that is connected with this problem.
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| Exception in thread "RubyThread-14: /Users/kbennett/.rvm/gems/jruby-1.7.3/gems/logging-1.8.1/lib/logging/diagnostic_context.rb:320" java.nio.channels.CancelledKeyException | |
| at sun.nio.ch.SelectionKeyImpl.ensureValid(SelectionKeyImpl.java:55) | |
| at sun.nio.ch.SelectionKeyImpl.readyOps(SelectionKeyImpl.java:69) | |
| at sun.nio.ch.KQueueSelectorImpl.updateSelectedKeys(KQueueSelectorImpl.java:105) | |
| at sun.nio.ch.KQueueSelectorImpl.doSelect(KQueueSelectorImpl.java:74) | |
| at sun.nio.ch.SelectorImpl.lockAndDoSelect(SelectorImpl.java:69) | |
| at sun.nio.ch.SelectorImpl.select(SelectorImpl.java:80) | |
| at org.jruby.util.io.SelectBlob.doSelect(SelectBlob.java:257) | |
| at org.jruby.util.io.SelectBlob.goForIt(SelectBlob.java:89) | |
| at org.jruby.RubyIO.select_static(RubyIO.java:3507) |
keithrbennett
/ logging_demo.rb
Created
June 3, 2013 01:19
Demonstrates the use of the Ruby 'logging' gem.
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| #!/usr/bin/env ruby | |
| require 'facter' | |
| require 'logging' | |
| require 'pry' | |
| require 'yaml' | |
| GLOBAL_LOGGING = true | |
keithrbennett
/ build_gem.sh
Created
June 13, 2013 02:56
Shows a strategy for creating both MRI and JRuby versions of a gem.
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| # Builds the gem for the current rvm ruby/platform. | |
| # Run this once for MRI and once for JRuby, as in: | |
| # | |
| # rvm 1.9 | |
| # ./build_gem.sh | |
| # rvm jruby | |
| # ./build_gem.sh | |
| GEM_NAME=my_gem |
keithrbennett
/ semantic_equality.rb
Last active
December 19, 2015 04:19
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| class Name | |
| attr_accessor :first_name, :last_name | |
| def initialize(first_name, last_name) | |
| @first_name = first_name | |
| @last_name = last_name | |
| end | |
| def name |