kwleland

At Monmouth Telecom we provide high-availability cloud based telephone systems for medium to large companies. Because
we have written our own code in Ruby it is easy for us to customize or add additional features at the request of customers,
often at no charge, and that is key to our business.

Several years ago our engineering team developed a real time display panel for managers and operators alike that kept people
abreast of the status of phone extensions, conference bridges, and call queues, as well as allowing a variety of call control
features.  We wrote this in ruby so that it would be easy to extend.  The web display panel accesses customer data through
Active Record and is based on HTML5 with canvas and web sockets so it doesn’t require setup on the customer site.
Unsurprisingly it was one our more popular features and so we immediately started monitoring Rubinius as our migration path
for the day when one core of our 8 processor cores would become insufficient to meet demand.  Well earlier this year

kwleland

Script started on Tue 12 May 2015 01:44:04 PM EDT
[root@ops ~]# gdb -p 30764
GNU gdb (GDB) Red Hat Enterprise Linux (7.2-60.el6_4.1)
Copyright (C) 2010 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
and "show warranty" for details.
This GDB was configured as "x86_64-redhat-linux-gnu".
For bug reporting instructions, please see:

kwleland

Starting program: /usr/bin/rbx ./t.rb
[Thread debugging using libthread_db enabled]
[New Thread 0x7fffef301700 (LWP 6838)]
[New Thread 0x7fffeef00700 (LWP 6839)]
[New Thread 0x7fffeeaff700 (LWP 6840)]
[New Thread 0x7fffee6fe700 (LWP 6841)]
[New Thread 0x7fffee2fd700 (LWP 6842)]
[New Thread 0x7fffedefc700 (LWP 6843)]
[New Thread 0x7fffecec7700 (LWP 6844)]
[New Thread 0x7ffff6179700 (LWP 6847)]

kwleland

  Thread.new do  
    while true
      sleep 10
      puts "heartbeat"
    end
  end
    
  while true 
    ar = []
    100.times do

kwleland

Script started on Tue 07 Apr 2015 10:23:47 AM EDT
[root@app0 ~]# gdb -p 22482
GNU gdb (GDB) Red Hat Enterprise Linux (7.2-75.el6)
Copyright (C) 2010 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
and "show warranty" for details.
This GDB was configured as "x86_64-redhat-linux-gnu".
For bug reporting instructions, please see:

kwleland

  require 'benchmark'
  require 'benchmark/ips'

  Benchmark.ips do |x|

    s = "abcdefghijk"
    last_index = s.length - 1
    middle_index = last_index/2

    x.report("element assignment at beginning") do |times|

kwleland

# Word anagrams (with duplicates).
# Submitted by Giovanni Intini <[email protected]>

class String
  def swap(i)
    tmp = self[0,1]
    self[0] = self[i]
    self[i] = tmp
    self
  end

kwleland

Thread 1: total running time: 191.491809676s

  %   cumulative   self                self     total
 time   seconds   seconds      calls  ms/call  ms/call  name
------------------------------------------------------------
   8.36   23.56     16.02    4150098     0.00     0.01  String#[]
   7.43   27.81     14.24    2903040     0.00     0.01  String#replace
   7.32   35.12     14.03    1247058     0.01     0.03  String#[]=
   6.25   63.45     11.97    2903040     0.00     0.02  String#+
   5.84   26.53     11.19     884179     0.01     0.03  Array::recursively_flatten<1796> {}

kwleland

  require 'benchmark'
  require 'benchmark/ips'

  long_text = File.new('holmes.txt').read.downcase
    #holmes.txt @  http://norvig.com/holmes.txt
  medium_text = long_text.slice(0,1000)
  short_text = long_text.slice(0,100)

  Benchmark.ips do |x|
    x.report "string scan (long length)" do |times|

kwleland

admin2:ruby kwleland$ ruby -Xdebug x8.rb
An exception occurred running the debugger:

    no such file to load -- rubinius/compiler/iseq (LoadError)

Backtrace:

                         Rubinius::CodeLoader#load_error at kernel/common/code_loader.rb:440
               Rubinius::CodeLoader#resolve_require_path at kernel/common/code_loader.rb:423
                     { } in Rubinius::CodeLoader#require at kernel/common/code_loader.rb:103