benweint

#!/usr/bin/env ruby

require 'benchmark'

length = 512
iterations = 100000
encodings = Encoding.name_list

Benchmark.bmbm do |r|
  r.report("encode") do

benweint

gem 'rails', '~>4.0.2'
gem 'rubysl', :platforms => [:rbx]
gem 'racc', :platforms => [:rbx]

benweint

#!/usr/bin/env ruby

#
# This is a proof-of-concept script to build every commit of ruby over the past
# year and store all of the resulting builds in git. The purpose of using git
# for storage is to take advantage of its de-duplication and compression
# features.
#
# Requirements:
# - git

benweint

(gdb) t a a bt

Thread 5 (process 11796):
#0  0x00000001003d8e4f in llvm::SelectionDAG::getFrameIndex ()
#1  0x000000010027d55b in (anonymous namespace)::X86DAGToDAGISel::getAddressOperands ()
#2  0x000000010027da18 in (anonymous namespace)::X86DAGToDAGISel::SelectAddr ()
#3  0x000000010027a78c in (anonymous namespace)::X86DAGToDAGISel::CheckComplexPattern ()
#4  0x000000010043994c in llvm::SelectionDAGISel::SelectCodeCommon ()
#5  0x0000000100274536 in (anonymous namespace)::X86DAGToDAGISel::Select ()
#6  0x000000010043bc41 in llvm::SelectionDAGISel::DoInstructionSelection ()

benweint

#!/usr/bin/env ruby

string = "\n\v"

puts "before racc require: #{Array(string).inspect}"
require 'racc'
puts "after racc require: #{Array(string).inspect}"

benweint

#!/usr/bin/env ruby

class BadString < String; end

original      = (0..255).to_a.pack("C*").force_encoding("UTF-8")
subclass      = BadString.new(original)
round_tripped = subclass.to_s

puts "encoding:       original = #{original.encoding}, subclass = #{subclass.encoding}, round_tripped = #{round_tripped.encoding}"
puts "valid_encoding? original = #{original.valid_encoding?}, subclass = #{subclass.valid_encoding?}, round_tripped = #{round_tripped.valid_encoding?}"

benweint

module A
  def foo
    puts "foo from A"
  end
end

class B
  include A

  def foo

benweint

#!/usr/bin/env ruby

puts "Run this in another terminal:"
puts ""
puts "  sudo ./trace-gc-standalone.sh #{$$}"
puts ""
puts "... wait for the 'Ready!' message, switch back here and press enter to start."

GC::Profiler.enable
$stdin.gets

benweint

#!/usr/bin/env ruby

t0 = Time.now
GC::Profiler.enable

100000.times do
  String.new('a' * 1000)
end

gc_time = GC::Profiler.total_time

benweint

#!/usr/bin/env ruby

require 'thread'
require 'rubygems'
require 'monitor'

class Dummy
  include MonitorMixin

  def sync