kessler

echo ec2-user soft nofile 999999 >> /etc/security/limits.conf 
echo ec2-user hard nofile 999999 >> /etc/security/limits.conf 
echo root soft nofile 999999 >> /etc/security/limits.conf 
echo root hard nofile 999999 >> /etc/security/limits.conf 

echo net.core.rmem_max = 33554432 >> /etc/sysctl.conf
echo net.core.wmem_max = 33554432 >> /etc/sysctl.conf
echo net.ipv4.tcp_rmem = 4096 16384 33554432 >> /etc/sysctl.conf
echo net.ipv4.tcp_wmem = 4096 16384 33554432 >> /etc/sysctl.conf
echo net.ipv4.tcp_mem = 786432 1048576 26777216 >> /etc/sysctl.conf

branneman

Better local require() paths for Node.js

Problem

When the directory structure of your Node.js application (not library!) has some depth, you end up with a lot of annoying relative paths in your require calls like:

const Article = require('../../../../app/models/article');

Those suck for maintenance and they're ugly.

Possible solutions

ndhu

/**
 * Created by andy hulstkamp
 */

var webpage = require("webpage"),
    fs = require("fs");

var debug = false,
    pageIndex = 0,
    allLinks = [],

twokul

Hidden classes in JavaScript and Inline Caching

Knowing how internals work is always a good. Pretty much for everything. Cars, trains, computers, you name it. It gives you an insight on what happens under the hood. You also act/react differently based on this knowledge.

As you might have guessed, it’s also true for web development. Knowledge of CSS transitions allows you to achieve better performance and not to use JavaScript in most cases. Knowledge of V8 internals allows you to write more performant JavaScript code. So let’s talk about V8 a little.

A little about V8

V8 is a JavaScript engine built by Google. Firefox built SpiderMonkey, Opera built Carakan and Microsoft built Chakra. One very important difference between V8 and other JavaScript engines is that V8 doesn’t generate any intermediate code. It compiles JavaScr

kessler

#!/bin/sh

sub="/Applications/Sublime Text.app/Contents/SharedSupport/bin/subl"

target=$1

if [[ -z $target ]]
	then
		target=$(pwd)
fi

kessler

#!/bin/sh
sudo /etc/init.d/iptables save
sudo /etc/init.d/iptables stop
sudo chkconfig iptables off

sudo /etc/init.d/ip6tables save
sudo /etc/init.d/ip6tables stop
sudo chkconfig ip6tables off

kessler

setTimeout(function() {
	console.log('queue a print AFTER a second')
}, 1000)

setInterval(function() {
	console.log('queue a print EVERY second')
}, 1000)

setImmediate(function() {
	console.log('queue a print in the next event loop tick but after IO tasks are done')

kessler

var count = 0
var countWithDelay = 0

function recurse() {
	console.log('recurse: %d', count)

    if (count++ === 100)  return
    
    setImmediate(recurse)
}

kessler

echo "downloading scripts"
curl https://gist.githubusercontent.com/kessler/6122814/raw/002f1f919b937fd067a36f1a3b47050e4a3645e4/linux%20net%20settings > netchakra.sh
chomd +x netchakra.sh

curl https://gist.githubusercontent.com/kessler/5885063/raw/38f201ff740b25782bc04d3af11b4f3823478b4d/install-node > install-node.sh
chmod +x install-node.sh

curl https://gist.githubusercontent.com/kessler/6412374/raw/7b088bbeaf36ac845a6c2b6950d0e9f4d8d2d6b8/install-zeromq > install-zmq.sh
chmod +x install-zmq.sh

matthewmueller

# OSX for Hackers (Mavericks/Yosemite)
#
# Source: https://gist.github.com/brandonb927/3195465

#!/bin/sh

# Some things taken from here
# https://github.com/mathiasbynens/dotfiles/blob/master/.osx

# Ask for the administrator password upfront