R D FMJaguar

What is the Strict Aliasing Rule and Why do we care?

(OR Type Punning, Undefined Behavior and Alignment, Oh My!)

What is strict aliasing? First we will describe what is aliasing and then we can learn what being strict about it means.

In C and C++ aliasing has to do with what expression types we are allowed to access stored values through. In both C and C++ the standard specifies which expression types are allowed to alias which types. The compiler and optimizer are allowed to assume we follow the aliasing rules strictly, hence the term strict aliasing rule. If we attempt to access a value using a type not allowed it is classified as undefined behavior(UB). Once we have undefined behavior all bets are off, the results of our program are no longer reliable.

Unfortunately with strict aliasing violations, we will often obtain the results we expect, leaving the possibility the a future version of a compiler with a new optimization will break code we th

Comparative Benchmark Numbers @ Rackspace

I've taken the benchmarks from Matthew Rothenberg's phoenix-showdown, updated Phoenix to 0.13.1 and ran the tests on the most powerful machines available at Rackspace.

Results

Framework	Throughput (req/s)	Latency (ms)	Consistency (σ ms)

Usage

Install cordova into `node_modules`

npm install cordova

	create-react-app $APP_NAME
	cd $APP_NAME
	git init
	heroku create $APP_NAME --buildpack https://github.com/mars/create-react-app-buildpack.git
	git add .
	git commit -m "Start with create-react-app"
	git push heroku master
	heroku open

	Sanshiro Sugata (1943)
	The Most Beautiful (1944)
	Sanshiro Sugata Part Two (1945)
	The Men Who Tread on the Tiger's Tail (1945)
	No Regrets for Our Youth (1946)
	One Wonderful Sunday (1947)
	Drunken Angel (1948)
	Stray Dog (1949)
	Scandal (1950)
	Rashomon (1950)

	#r "node_modules/fable-core/Fable.Core.dll"


	open Fable.Core

	// Grid abstarct (Middle Layer)

	type GridLineTypes =
	\| None = 0
	\| Solid = 1

	/*<?php
	///public class PhpJava { public static void main(String[] args) { System.out.printf("/%s",
	//\u000A\u002F\u002A
	class PhpJava {
	static function main() {
	echo(//\u000A\u002A\u002F
	"Hello World!");
	}}
	//\u000A\u002F\u002A
	PhpJava::main();

	# iOS
	app_identifier "com.myapp.app" # The bundle identifier of your app
	apple_id "[email protected]" # Your Apple email address
	team_id "1234ABCD" # Developer Portal Team ID

	# Android
	json_key_file "./google-play-api-secret.json" # Path to the json secret file - Follow https://github.com/fastlane/supply#setup to get one
	package_name "com.myapp.app" # Your Android app package

	FROM php:5.6-fpm

	# compile + install xdebug
	RUN curl -SL "http://xdebug.org/files/xdebug-2.3.3.tgz" -o xdebug.tar.xz \
	&& mkdir -p /usr/src/xdebug \
	&& tar -xof xdebug.tar.xz -C /usr/src/xdebug --strip-components=1 \
	&& rm xdebug.tar.xz \
	&& cd /usr/src/xdebug \
	&& phpize \
	&& ./configure \

	call airline#parts#define_function('goinfo', 'go#complete#GetInfo')
	call airline#parts#define_condition('goinfo', '&ft =~ "go"')
	function! AirlineInit()
	" Ended up not having virtualenv here since for some reason it insisted on having that as a bare string
	let g:airline_section_x = airline#section#create_right(['goinfo', 'tagbar', 'filetype'])
	endfunction
	autocmd VimEnter * call AirlineInit()