ksss

                                       user     system      total        real
100000times                        0.010000   0.000000   0.010000 (  0.005554)
Array#new 100000times              0.020000   0.000000   0.020000 (  0.024416)
List#new 100000times               0.040000   0.000000   0.040000 (  0.037131)
Array#[] 100000times               0.020000   0.000000   0.020000 (  0.016521)
List#[] 100000times               17.200000   0.020000  17.220000 ( 17.238337)
Array#push 100000times             0.010000   0.000000   0.010000 (  0.019409)
List#push 100000times              0.030000   0.000000   0.030000 (  0.026331)
Array#unshift 100000times          0.020000   0.000000   0.020000 (  0.019558)
List#unshift 100000times           0.030000   0.000000   0.030000 (  0.030940)

ksss

class HashDoubly
  attr_accessor :key, :value
  
  def initialize hash=nil
    if hash
      @key = hash.dup
      @value = hash.dup.invert
    else
      @key = {}

ksss

$ ./bin/mruby hash_symbol_key.rb
set * 100 : 0.35799999999999
get * 100 : 0.11299999999999
update * 100 : 0.12799999999999
set * 1000 : 6.31099999999999
get * 1000 : 2.2480
update * 1000 : 2.4580
set * 10000 : 387.5570
get * 10000 : 184.548999999999
update * 10000 : 186.326999999999

ksss

a = []
h = {}
h[a] = 1
a.push 1
p h #=> {[1]=>1}
p h[a] #=> nil
b = []
p h[b] #=> nil
h[b] = 2
p h #=> {[1]=>1, []=>2}

ksss

module Mod
  def foo
    :orig
  end
end

class Cla
  include Mod
end

ksss

$ ruby simple_worker.rb 4
[52341]
[52341, 52342]
[52341, 52342, 52343]
[52341, 52342, 52343, 52344]
after wait pid:52341, status:#<Process::Status: pid 52341 exit 0>
[52342, 52343, 52344, 52345]
after wait pid:52343, status:#<Process::Status: pid 52343 exit 0>
[52342, 52344, 52345, 52346]
after wait pid:52342, status:#<Process::Status: pid 52342 exit 0>

ksss

# NanoWorker
# nano worker implementation use by thread
class NanoWorker
  attr_accessor :queue, :thread

  @@thread_map = {}

  class << self
    def [](name)
      @@thread_map[name] ||= new

ksss

#! /usr/bin/env ruby

class PureRubyQueue
  def initialize
    @que = []
    @waiters = []
  end

  def push(obj)
    @que << obj

ksss

$ cat test.rb
require 'tempfile'

Tempfile.open('tmp') do |f|
  f2 = f.dup

  f.write "aaa\nbbb\nccc\n"
  f.rewind
  p f.readline
  p f2.readline

ksss

#! /usr/bin/env ruby
# ruby strip_exif.rb [input.jpg] [output.jpg]

require 'stringio'

io = nil
in_path = ARGV[0]
out_path = ARGV[1]

File.open(in_path, 'rb') do |rf|