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

henrik

tmux cheatsheet

As configured in my dotfiles.

start new:

tmux

start new with session name:

max-mapper

Writing node modules with voxel.js

This is a short guide that will teach you the workflows that have been figured out by the voxel.js community for writing node modules + sharing them on NPM and Github. It is assumed that you have a basic understanding of JavaScript, github and the command line (if not you can check out an introduction to git and the command line or learn JS basics from JavaScript for Cats)

The voxel-tower repository on github contains all the example code from this guide.

Table of contents

• Installing Node
• Making a new project folder

igrigorik

alias gh="open \`git remote -v | grep git@github.com | grep fetch | head -1 | cut -f2 | cut -d' ' -f1 | sed -e's/:/\//' -e 's/git@/http:\/\//'\`"

kennwhite

(This isn't specific to Wireshark)

sudo vi /etc/pam.d/sudo

Add to the end BEGINNING of the file:

auth sufficient pam_tid.so

Test with a trivial sudo command, and you should get a TouchID prompt:

beaugunderson

from streams session

• end-of-stream - specify a callback to be called when a stream ends (which is surpsingly hard to get right)
• duplexify - compose a Duplex stream from a Readable and a Writable stream
• pump - pipe streams together and close all of them if one of them closes
• pumpify - combine an array of streams into a single duplex stream using pump and duplexify
• through2 - tools for making Transform streams
• from2 - tools for making Readable streams

from "participatory modules" session

yinhm

# Automaticlly install pptpd on Amazon EC2 Amazon Linux
# 
# Ripped from http://blog.diahosting.com/linux-tutorial/pptpd/
# pptpd source rpm packing by it's authors
#
# WARNING:
# first ms-dns setting to 172.16.0.23, 172.16.0.23 was showing on my
# /etc/resolv.conf, I'm not sure this is the same on all Amazon AWS zones.
#
# You need to adjust your "Security Groups" which you are using too.

sindresorhus

# npm publish with goodies
# prerequisite: `npm install -g trash`
# `np` with an optional argument `patch`/`minor`/`major`/`<version>`
# defaults to `patch`
np() {
	trash node_modules &>/dev/null;
	git pull --rebase &&
	npm install &&
	npm test &&
	npm version ${1:-patch} &&

macintux

• The Comprehensive Guide to Speaking at Technology Conferences in 2020 (https://www.cfpland.com/guides/speaking/)
• What I've learned after sending 147 proposals to 36 conferences in a year (https://drobinin.com/posts/what-ive-learned-after-sending-147-proposals-to-36-conferences-in-a-year/)
• Introduction to slides, a Clean Presentation Tool (https://zge.us.to/slides.html)
• A command-line based markdown presentation tool (https://github.com/visit1985/mdp)
• Giving a presentation with perfect UI/UX design (https://habr.com/en/post/471624/)
• Why Your Excellent Conference Talk Was Rejected (https://www.promptworks.com/blog/why-your-excellent-talk-was-rejected)
• Very Important Strangers (http://randsinrepose.com/archives/very-important-strangers/)
• Tips for Public Speaking (http://speaking.io)
• Presentation Skills Considered Harmful (http://seriouspony.com/blog/2013/10/4/presentation-skills-considered-harmful)
• Passionate Programmer: How to Give a Keynote (https://web.archive.org/web/20150211231805/http:/

neilj

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