eshack94

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

eshack94

• Docker Training Course for the Absolute Beginner
  • Docker-for-Beginners-Mumshad-Mannambeth.pdf
• Kustomize
  • Kustomize.pdf
• AZ-104: Microsoft Azure Administrator
  • Az-104.pdf
• HashiCorp Certified: Consul Associate Certification
  • Slides-Course-Introduction.pdf
  • Slides-Objective-1-Explain-Consul-Architecture.pdf
• Slides-Objective-2-Deploy-a-Single-Datacenter.pdf

eshack94

System Design Cheatsheet

Picking the right architecture = Picking the right battles + Managing trade-offs

Basic Steps

1. Clarify and agree on the scope of the system

• User cases (description of sequences of events that, taken together, lead to a system doing something useful)
  • Who is going to use it?
  • How are they going to use it?

eshack94

Upgrading to iOS/iPadOS 14.3 NOW

make sure you read the WHOLE THING

APPLE SERVERS HAVING ISSUES

A14 BUGGED

UPDATE REGARDING A13 AND BELOW VERIFY ISSUES

eshack94

const puppeteer = require("puppeteer");
const opn = require("opn");
const nodemailer = require("nodemailer");

const timeout = 5000;
const waitForTimeout = 1000;

const cartLink =
  "https://store.nvidia.com/store/nvidia/en_US/buy/productID.5438481700/clearCart.yes/nextPage.QuickBuyCartPage";

eshack94

Keybase proof

I hereby claim:

• I am eshack94 on github.
• I am eshack94 (https://keybase.io/eshack94) on keybase.
• I have a public key ASD6X637W5qIzP63BxND3WNQCZFsWFj1Ib_3_gul93hMBAo

To claim this, I am signing this object:

eshack94

Launching iTerm2 from macOS Finder

(Based on info from Peter Downs' gitub but with modified behavior to open a new terminal window for each invocation instead of reusing an already open window.)

The following three ways to launch an iTerm2 window from Finder have been tested on iTerm2 version 3+ running on macOS Mojave+.

pdanford - April 2020

---

eshack94

ssh-keygen -t rsa -b 4096 -N '' -C "rthijssen@gmail.com" -f ~/.ssh/id_rsa
ssh-keygen -t rsa -b 4096 -N '' -C "rthijssen@gmail.com" -f ~/.ssh/github_rsa
ssh-keygen -t rsa -b 4096 -N '' -C "rthijssen@gmail.com" -f ~/.ssh/mozilla_rsa

eshack94

tmux shortcuts & cheatsheet

start new:

tmux

start new with session name:

tmux new -s myname

eshack94

FILE SPACING:

 # double space a file
 sed G

 # double space a file which already has blank lines in it. Output file
 # should contain no more than one blank line between lines of text.
 sed '/^$/d;G'