hone

Terence Lee

Contact details

• Twitter: @hone02
• Website or Blog: http://hone.heroku.com
• Company: Example Ltd. http://www.heroku.com

Speaker bio

hone

A Call For Help: Testing Changes to Ruby 2.1.x's GC

Backstory

There's been some known memory issues when upgrading from Ruby 2.0.0 to Ruby 2.1. Ruby 2.1 introduced a new garbage collector (GC), RGenGC, to improve performance. It traded more memory use for speed. The new GC does less aggressive memory clearing. Doing less work means it's faster.

This sounds great, but on lower memory instances it became an issue since there is less memory available to trade. This patch had been applied to Ruby 2.1 and the hopes are it will solve this [issue](https://bugs.ruby-lang.org/issues/ 9607#note-11). By introducing more frequent GC runs, it will reduce the amount of memory being used.

Great, How Can I Help?

hone

#include <string>
#include "image_loader.h"
#include <cv.h>
#include <highgui.h>

/**
 * constructs a box filter. a matrix with all 1s and is normalized.
 * @param size of box filter as an int.
 */
void makeBoxFilter( CvMat * mat, int w )

hone

#include <mpi.h>
#include <iostream>
#include <string.h>
#include <gameoflife.hpp>

const int DIMENSIONS = 16;
const int DEAD = 0;
const int ALIVE = 1;
const int ITERATIONS = 64;
const int LENGTH = DIMENSIONS * DIMENSIONS;

hone

# detach on hangup
autodetach on

# # don't display the copyright page
startup_message off

hardstatus alwayslastline
hardstatus string '%{= kG}[ %{G}%H %{g}][%= %{=kw}%?%-Lw%?%{r}(%{W}%n*%f%t%?(%u)%?%{r})%{w}%?%+Lw%?%?%= %{g}][%{B}%Y-%m-%d %{W}%c %{g}]'

# terminfo and termcap for nice 256 color terminal

hone

=> Mixing in Lockdown version: 1.1.0
=> Requiring Lockdown rules engine: /home/hone/Projects/oib/boxboss/lib/lockdown/init.rb
DashboardController
  responding to GET index
>> Lockdown: Permission not found in db: Login, creating.
>> Lockdown: Permission not found in db: Venue Director Dashboard, creating.
>> Lockdown: Permission not found in db: Register Account, creating.
>> Lockdown: Permission not found in db: My Account, creating.
>> Lockdown: UserGroup not in the db: Venue Director, creating.
    should redirect to the login page if the user is not logged in

hone

In a Clarion workshop, victims, I mean participants, usually sit or lounge in a
rough circle, where each in turn has to sit silently while every other participant
attacks, I mean critiques, the victim’s baby, I mean manuscript. The process
is brutal at the start, but because everyone is both attacker and attacked, most
participants soon learn valuable lessons in how to take and give criticism. And
until you’ve learned to take criticism you will always meet barriers to growth
in your craft.

hone

$ bin/git_pivot current_sprint
+--------------------------------------------------+
|   ID   |  Type   | Owner |   State   |   Name    |
+--------------------------------------------------+
| 683969 | feature |       | unstarted | RT action |
+--------------------------------------------------+

hone

class Test
  def self.foo
    puts 'hi'
  end
  def self.boo
    puts 'world'
  end
end

[:foo, :boo].each {|method_name| Test.send(method_name) }

hone

# normal new.html.erb
<<ERB
<p>This is some text</p>
ERB

# outputting a variable name,
# name = "joe"
<<ERB
<p>Hello <%= name %></p>
ERB