Stratos Pavlakis th3hunt

libevent vs libuv

Comparing libevent and libuv. My upfront biased: I want to like libevent. However, I want to objectively compare the two and make an informed decision.

What versions are we comparing?

libevent 2.0.22 (Stable) [2014-01-05]
libuv 1.8.0 (Stable) [2015-12-15]

Folder Structure

Motivations

Clear feature ownership
Module usage predictibility (refactoring, maintainence, you know what's shared, what's not, prevents accidental regressions, avoids huge directories of not-actually-reusable modules, etc)

A bunch of good git tutorials

Intro to git

Simplest intro to git by github and codeschool - Try Git
PeepCode Git Internals PDF
[Intro to github]

What forces layout / reflow

All of the below properties or methods, when requested/called in JavaScript, will trigger the browser to synchronously calculate the style and layout*. This is also called reflow or layout thrashing, and is common performance bottleneck.

Element

Box metrics

elem.offsetLeft, elem.offsetTop, elem.offsetWidth, elem.offsetHeight, elem.offsetParent
elem.clientLeft, elem.clientTop, elem.clientWidth, elem.clientHeight
elem.getClientRects(), elem.getBoundingClientRect()

Clustering: The basics

The trick? pass the file descriptor from a parent process and have the server.listen reuse that descriptor. So multiprocess in their own memory space (but with ENV shared usually)

It does not balance, it leaves it to the kernel.

In the last nodejs > 0.8 there is a cluster module (functional although marked experimental)

http://nodejs.org/api/cluster.html
Simple cluster example:

What is your folder-structure preference for a large-scale Node.js project?

0: Starting from Rails

This is the reference point. All the other options are based off this.

|-- app
|   |-- controllers
|   |   |-- admin

AWS ECS Deploy Permissions

In order to be able to deploy using the scripts provided by npm scripts for AWS ECS make sure your user is part of an IAM Group that has the following inline policy applied to it.

Note: This may not be complete.

{
    "Version": "2012-10-17",
    "Statement": [

PSQL

Magic words:

psql -U postgres

Some interesting flags (to see all, use -h or --help depending on your psql version):

-E: will describe the underlaying queries of the \ commands (cool for learning!)
-l: psql will list all databases and then exit (useful if the user you connect with doesn't has a default database, like at AWS RDS)

	/*
	* object.watch polyfill
	*
	* 2012-04-03
	*
	* By Eli Grey, http://eligrey.com
	* Public Domain.
	* NO WARRANTY EXPRESSED OR IMPLIED. USE AT YOUR OWN RISK.
	*/

	{
	"private": true,
	// ...
	"#dependencies": "dependencies are the one shipped to the client",
	"dependencies": {
	"babel-polyfill": "^6.7.4",
	"react": "^15.0.0",
	// ...
	"whatwg-fetch": "^0.11.1"
	},