Dave Snigier Dave-Snigier

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These instructions work for the Raspberry Pi running Raspbian (hard float) and create a hardware optimized version of NodeJS for the Raspberry PI, (and include a working install and NPM!!!):

Install Raspbian - http://www.raspberrypi.org/downloads
Install the necessary dependecies:

sudo apt-get install git-core build-essential

(If you just installed git then you need to administer your git identity first, else adding the patches below will fail!!!)

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

	# https://gist.github.com/stefansundin/6261442
	# Python 3.x
	# Binary search for the correct clen parameter for YouTube live streams, which is useful when a segment is no longer listed in the playlist file (check EXT-X-EARLIEST-MEDIA-SEQUENCE).
	# It's quick and dirty. clen is always a multiple of 188 (since it is TS). lmt and dur does not have any impact it seems.
	# Usually finds the correct url in about 15 tries.
	# See http://stefansundin.com/blog/452#comments
	# TODO: add threading to process multiple sequence numbers at the same time.

	"""
	Regexps to extract clen and dur from a playlist:

	#!/bin/bash
	#
	# The reason of creating this script is that Endpoint Security VPN installs it's own application firewall kext cpfw.kext
	# which prevents for example PPTP connections from this computer, which is not appropriate if you need subj connection just
	# from time to time
	#
	# Usage: ./checkpoint.sh
	#
	# The script checks if Enpoint Security VPN is running. If it is, then it shuts it down, if it is not, it fires it up.
	# Or, make an Automator action and paste the script.

	bid() {
	local shortname location

	# combine all args as regex
	# (and remove ".app" from the end if it exists due to autocomplete)
	shortname=$(echo "${@%%.app}"\|sed 's/ /.*/g')
	# if the file is a full match in apps folder, roll with it
	if [ -d "/Applications/$shortname.app" ]; then
	location="/Applications/$shortname.app"
	else # otherwise, start searching

	#!/bin/bash
	# bash generate random alphanumeric string
	#

	# bash generate random 32 character alphanumeric string (upper and lowercase) and
	NEW_UUID=$(cat /dev/urandom \| tr -dc 'a-zA-Z0-9' \| fold -w 32 \| head -n 1)

	# bash generate random 32 character alphanumeric string (lowercase only)
	cat /dev/urandom \| tr -dc 'a-z0-9' \| fold -w 32 \| head -n 1