Christoph Berger christophberger

## latency.markdown

      
              2 files
            
          
              761 forks
            
          
                52 comments
              
            
              4512 stars
            
          
                hellerbarde
                / latency.markdown
            
            
              Created
              May 31, 2012 13:16
                — forked from jboner/latency.txt
            
              
                Latency numbers every programmer should know
              
          
    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

  
## OpenSimplex2S.java
/**
 * K.jpg's OpenSimplex 2, smooth variant ("SuperSimplex")
 *
 * More language ports, as well as legacy 2014 OpenSimplex, can be found here:
 * https://github.com/KdotJPG/OpenSimplex2
 */

public class OpenSimplex2S {

    private static final long PRIME_X = 0x5205402B9270C86FL;

## gist:eb60ab878eb73a7c5e22
// You don't want to serve HTTPS supporting for SSL3.0 any longer, see:
// http://googleonlinesecurity.blogspot.de/2014/10/this-poodle-bites-exploiting-ssl-30.html
import (
	"crypto/tls"
	"net/http"
)

// This code supports SSL3.0, TLS1.0, TLS1.1 and TLS1.2
// Chances are you currently do this but want to stop due to the POODLE
err := http.ListenAndServeTLS(addr, "crtfile", "keyfile", handler)

## go_completion.sh
function godir {
    if [ -z "$1" ]
    then
        cd $GOPATH/src
    else
        if [ "$1" == "reload" ]
        then
            _go_package_names=( $(go list all) )
        else
            cd $GOPATH/src/$1

## Mac OS X: Open in Visual Studio Code
- Open Automator
- File -> New -> Service
- Change "Service Receives" to "files or folders" in "Finder"
- Add a "Run Shell Script" action
- Change "Pass input" to "as arguments"
- Paste the following in the shell script box: open -n -b "com.microsoft.VSCode" --args "$*"
- Save it as something like "Open in Visual Studio Code"

## TypeClipboard.md

      
              3 files
            
          
              26 forks
            
          
                26 comments
              
            
              190 stars
            
          
                ethack
                / TypeClipboard.md
            
            
              Last active
              October 31, 2024 06:34
            
              
                Scripts that simulate typing the clipboard contents. Useful when pasting is not allowed.
              
          
    It "types" the contents of the clipboard.
Why can't you just paste the contents you ask?  Sometimes pasting just doesn't work.

One example is in system password fields on OSX.
Sometimes you're working in a VM and the clipboard isn't shared.
Other times you're working via Remote Desktop and again, the clipboard doesn't work in password boxes such as the system login prompts.
Connected via RDP and clipboard sharing is disabled and so is mounting of local drives.  If the system doesn't have internet access there's no easy way to get things like payloads or Powershell scripts onto it... until now.

Windows

The Windows version is written in AutoHotKey and easily compiles to an executable. It's a single line script that maps Ctrl-Shift-V to type the clipboard.

  
## tx.go
// TxFunc is a function that can be wrapped in a transaction
type TxFunc func(tx *sql.Tx) error

// WithTx wraps a function in an sql transaction. After the function returns, the transaction is
// committed if there's no error, or rolled back if there is one.
func WithTx(db *sql.DB, f TxFunc) (err error) {
	tx, err := db.Begin()
	if err != nil {
		return err
	}

## build_caddy.sh
#!/usr/bin/env bash
#
# Author: @nikolaizujev
#
# Big respect to @mholt6 for making Caddy
#
# This script is based on:
#  - https://www.calhoun.io/building-caddy-server-from-source/
#  - https://g.liams.io/liam/simple-build-caddy.git
#

## FlyIO+Tailscale.md

      
              2 files
            
          
              0 forks
            
          
                0 comments
              
            
              4 stars
            
          
                LuckyGeck
                / FlyIO+Tailscale.md
            
            
              Last active
              December 17, 2023 06:54
            
              
                Tailscale exit node on Fly.io
              
          
    How to setup Tailscale exit note on fly.io


Open https://fly.io and register
Open https://login.tailscale.com/admin/settings/keys to Generate auth key, pick Reusable+Ephemeral

Install and authenticate your flyctl

$ brew install flyctl
$ flyctl auth login

  
## .dockerignore
/.git
	/**
	* K.jpg's OpenSimplex 2, smooth variant ("SuperSimplex")
	*
	* More language ports, as well as legacy 2014 OpenSimplex, can be found here:
	* https://github.com/KdotJPG/OpenSimplex2
	*/

	public class OpenSimplex2S {

	private static final long PRIME_X = 0x5205402B9270C86FL;
	// You don't want to serve HTTPS supporting for SSL3.0 any longer, see:
	// http://googleonlinesecurity.blogspot.de/2014/10/this-poodle-bites-exploiting-ssl-30.html
	import (
	"crypto/tls"
	"net/http"
	)

	// This code supports SSL3.0, TLS1.0, TLS1.1 and TLS1.2
	// Chances are you currently do this but want to stop due to the POODLE
	err := http.ListenAndServeTLS(addr, "crtfile", "keyfile", handler)
	function godir {
	if [ -z "$1" ]
	then
	cd $GOPATH/src
	else
	if [ "$1" == "reload" ]
	then
	_go_package_names=( $(go list all) )
	else
	cd $GOPATH/src/$1
	- Open Automator
	- File -> New -> Service
	- Change "Service Receives" to "files or folders" in "Finder"
	- Add a "Run Shell Script" action
	- Change "Pass input" to "as arguments"
	- Paste the following in the shell script box: open -n -b "com.microsoft.VSCode" --args "$*"
	- Save it as something like "Open in Visual Studio Code"
	// TxFunc is a function that can be wrapped in a transaction
	type TxFunc func(tx *sql.Tx) error

	// WithTx wraps a function in an sql transaction. After the function returns, the transaction is
	// committed if there's no error, or rolled back if there is one.
	func WithTx(db *sql.DB, f TxFunc) (err error) {
	tx, err := db.Begin()
	if err != nil {
	return err
	}
	#!/usr/bin/env bash
	#
	# Author: @nikolaizujev
	#
	# Big respect to @mholt6 for making Caddy
	#
	# This script is based on:
	# - https://www.calhoun.io/building-caddy-server-from-source/
	# - https://g.liams.io/liam/simple-build-caddy.git
	#