Johannes Hoff johshoff

I spent six months traveling around the world with my partner Jen. It was one of the most fulfilling and exciting things I've ever done.

This document lists my route, December 2016 to May 2017.

Current status

I'm back in Portland, Oregon! I am so thankful for the opportunity to have spent six months traveling around the world while working remotely. It was one of the most fulfilling experiences of my life. I am back in Portland to stay and excited to call it home. I'm looking forward to re-establishing my yoga practice and getting in skydives toward by B license.

During my travels, I was able to visit thirteen countries: New Zealand, Australia, Indonesia, Taiwan, Malaysia, Thailand, India, Singapore, the United Arab Emirates, Egypt, Morocco, Spain and Canada. All but the last two were new experiences for me. Working while traveling permitted me to stay longer to get a feel for the local culture, and also gave me a feel for local life by requiring me to find wifi and cafes to work.

Latency numbers every programmer should know

L1 cache reference ......................... 0.5 ns
Branch mispredict ............................ 5 ns                     on recent CPU
L2 cache reference ........................... 7 ns                     14x L1 cache
Mutex lock/unlock ........................... 25 ns
Main memory reference ...................... 100 ns                     20x L2 cache, 200x L1 cache
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 4X memory

	#!/bin/bash
	# License: Public Domain.
	# Author: Joseph Wecker, 2012
	#
	# Are you tired of trying to remember what .bashrc does vs .bash_profile vs .profile?
	# Are you tired of trying to remember how darwin/mac-osx treat them differently from linux?
	# Are you tired of not having your ~/.bash* stuff work the way you expect?
	#
	# Symlink all of the following to this file:
	# * ~/.bashrc

	graph europe {
	edinburch -- london [len=4];
	london -- amsterdam [len=2];
	london -- dieppe [len=2];
	dieppe -- brest [len=2];
	brest -- paris [len=3];
	dieppe -- paris [len=1];
	dieppe -- bruxelles [len=2];
	amsterdam -- essen [len=3];
	amsterdam -- frankfurt [len=2];