hellerbarde

Latency numbers every programmer should know

L1 cache reference ......................... 0.5 ns
Branch mispredict ............................ 5 ns
L2 cache reference ........................... 7 ns
Mutex lock/unlock ........................... 25 ns
Main memory reference ...................... 100 ns             
Compress 1K bytes with Zippy ............. 3,000 ns  =   3 µs
Send 2K bytes over 1 Gbps network ....... 20,000 ns  =  20 µs
SSD random read ........................ 150,000 ns  = 150 µs

Read 1 MB sequentially from memory ..... 250,000 ns = 250 µs

nikcub

In August 2007 a hacker found a way to expose the PHP source code on facebook.com. He retrieved two files and then emailed them to me, and I wrote about the issue:

http://techcrunch.com/2007/08/11/facebook-source-code-leaked/

It became a big deal:

http://www.techmeme.com/070812/p1#a070812p1

The two files are index.php (the homepage) and search.php (the search page)

ndarville

Business Models

Advertising

Models	Examples
Display ads	Yahoo!
Search ads	Google

ck-on

<?php
/*
OCP - Opcache Control Panel   (aka Zend Optimizer+ Control Panel for PHP)
Author: _ck_   (with contributions by GK, stasilok)
Version: 0.1.7
Free for any kind of use or modification, I am not responsible for anything, please share your improvements

* revision history
0.1.7  2015-09-01  regex fix for PHP7 phpinfo
0.1.6  2013-04-12  moved meta to footer so graphs can be higher and reduce clutter

dideler

The program below can take one or more plain text files as input. It works with python2 and python3.

Let's say we have two files that may contain email addresses:

1. file_a.txt

foo bar
ok ideler.dennis@gmail.com sup
 hey...user+123@example.com,wyd
hello world!

peterjaap

Magento testing scenarios

For use after an upgrade to verify the correct working of Magento

Frontend

General

• Activate all logs on the server (PHP, MySQL, Magento, mail, etc)
• Check meta tags in HTML

umpirsky

• Sylius
• Sonata
• Vespolina
• Thelia
• Leaphly
• Elcodi
• WellCommerce

ValdikSS

• Developers have responded:

https://www.grc.com/misc/truecrypt/truecrypt.htm | https://twitter.com/stevebarnhart/status/472192457145597952

Steven Barnhart (@stevebarnhart) wrote to an eMail address he had used before and received several replies from “David.” The following snippets were taken from a twitter conversation which then took place between Steven Barnhart (@stevebarnhart) and Matthew Green (@matthew_d_green):

TrueCrypt Developer “David”: “We were happy with the audit, it didn't spark anything. We worked hard on this for 10 years, nothing lasts forever.”

Steven Barnhart: (Paraphrasing) Developer “personally” feels that fork is harmful: “The source is still available as a reference though.” >

kubaceg

#!/bin/bash

#CONFIG
backupDir='/mnt/backup'
magentoDir='/var/www/magento/htdocs'
magerunPath='/usr/bin/n98-magerun.phar'

#NUMBER OF DAYS TO KEEP BACKUPS
dailyKeepDays=7
weeklyKeepDays=30

wkjagt

#How I built an audio book reader for my nearly blind grandfather

Tweet this - Follow me

Last year, when visiting my family back home in Holland, I also stopped by my grand-parents. My grand-father, now 93 years old, had always been a very active man. However, during the presceding couple of months, he'd gone almost completely blind and now spent his days sitting in a chair. Trying to think of something for him to do, I suggested he try out audio books. After finally convincing him -- he said audio books were for sad old people -- that listening to a well performed recording is actually a wonderful experience, I realized the problem of this idea.

####The problem with audio devices and the newly blind. After my first impulse to jump up and go buy him an