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Derek Bassett derekbassett

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@jboner
jboner / latency.txt
Last active May 3, 2024 15:17
Latency Numbers Every Programmer Should Know
Latency Comparison Numbers (~2012)
----------------------------------
L1 cache reference 0.5 ns
Branch mispredict 5 ns
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 us
Send 1K bytes over 1 Gbps network 10,000 ns 10 us
Read 4K randomly from SSD* 150,000 ns 150 us ~1GB/sec SSD
@bastman
bastman / docker-cleanup-resources.md
Created March 31, 2016 05:55
docker cleanup guide: containers, images, volumes, networks

Docker - How to cleanup (unused) resources

Once in a while, you may need to cleanup resources (containers, volumes, images, networks) ...

delete volumes

// see: https://github.com/chadoe/docker-cleanup-volumes

$ docker volume rm $(docker volume ls -qf dangling=true)

$ docker volume ls -qf dangling=true | xargs -r docker volume rm

@jimbojsb
jimbojsb / gist:1630790
Created January 18, 2012 03:52
Code highlighting for Keynote presentations

Step 0:

Get Homebrew installed on your mac if you don't already have it

Step 1:

Install highlight. "brew install highlight". (This brings down Lua and Boost as well)

Step 2:

@so0k
so0k / kubectl.md
Last active April 25, 2024 12:40
Playing with kubectl output

Kubectl output options

Let's look at some basic kubectl output options.

Our intention is to list nodes (with their AWS InstanceId) and Pods (sorted by node).

We can start with:

kubectl get no
@agouriou
agouriou / nginx.conf
Last active April 5, 2024 15:57 — forked from Stanback/nginx.conf
Example Nginx (> 1.9) configuration for adding cross-origin resource sharing (CORS) support to reverse proxied APIs. Handle error status (4xx, 5xx) and expose headers.
#
# CORS header support
#
# One way to use this is by placing it into a file called "cors_support"
# under your Nginx configuration directory and placing the following
# statement inside your location block(s):
#
# include cors_support;
#
# A limitation to this method is that Nginx doesn't currently send headers
@abesto
abesto / gist:3476594
Created August 26, 2012 09:27
Go: Newton's method for square root
/*
A Tour of Go: page 44
http://tour.golang.org/#44
Exercise: Loops and Functions
As a simple way to play with functions and loops, implement the square root function using Newton's method.
In this case, Newton's method is to approximate Sqrt(x) by picking a starting point z and then repeating: z - (z*z - x) / (2 * z)
@julz
julz / main.go
Created November 20, 2015 12:39
containersched minicontainer
package main
import (
"fmt"
"os"
"os/exec"
"syscall"
)
func main() {
@derhuerst
derhuerst / intro.md
Last active February 22, 2024 17:30
Installing Git on Linux, Mac OS X and Windows
@rosterloh
rosterloh / getopts.sh
Created June 2, 2014 16:07
An example of how to use bash getopts
#!/bin/bash
######################################################################
#This is an example of using getopts in Bash. It also contains some
#other bits of code I find useful.
#Author: Linerd
#Website: http://tuxtweaks.com/
#Copyright 2014
#License: Creative Commons Attribution-ShareAlike 4.0
#http://creativecommons.org/licenses/by-sa/4.0/legalcode
@josephabrahams
josephabrahams / mavericks-iso.sh
Created September 13, 2014 22:20
Create a bootable ISO from the OS X Mavericks app
#!/bin/sh
# Create a bootable ISO from the OS X Mavericks app
# http://thezinx.com/misc/trend/create-bootable-dmg-iso-mavericks-app/
if [ ! -f /Applications/Install\ OS\ X\ Mavericks.app/Contents/SharedSupport/InstallESD.dmg ]; then
echo "Download the OS X Mavericks App and then rerun this script."
open "https://itunes.apple.com/us/app/os-x-mavericks/id675248567"
exit 1
fi