Jarek Przygódzki jarek-przygodzki

## latency.txt
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

## latency.markdown

      
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                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

  
## 2019-https-localhost.md

      
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                cecilemuller
                / 2019-https-localhost.md
            
            
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              May 9, 2024 08:24
            
              
                How to create an HTTPS certificate for localhost domains
              
          
    How to create an HTTPS certificate for localhost domains

This focuses on generating the certificates for loading local virtual hosts hosted on your computer, for development only.
Do not use self-signed certificates in production !
For online certificates, use Let's Encrypt instead (tutorial).

  
## git-branches-by-commit-date.sh
# Credit http://stackoverflow.com/a/2514279
for branch in `git branch -r | grep -v HEAD`;do echo -e `git show --format="%ci %cr" $branch | head -n 1` \\t$branch; done | sort -r

## wsl2_ciscoanyconnect_workaround.md

      
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                pyther
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              April 24, 2024 20:25
            
          
    WSL 2 Cisco AnyConnect Networking Workaround

Overview

WSL 2 uses a Hyper-V Virtual Network adapter. Network connectivity works without any issue when a VPN is not in use. However when a Cisco AnyConnect VPN session is established Firewall Rules and Routes are added which breaks connectivity within the WSL 2 VM. This issue is tracked WSL/issues/4277
Below outline steps to automatically configure the Interface metric on VPN connect and update DNS settings (/etc/resolv.conf) on connect/disconnect.
Manual Configuration

Set Interface Metrics


## How to add a submodule with shallow checkout and shallow clone
If you have a huge repository (in size and in history) and want to add a subfolder
to your project as a submodule you can follow this example to save time and space
using git's shallow clone and shallow checkout feature. It is a bit more complicated
in this example because I assume that you want your submodule to track a non-default
branch, called `mybranch`, instead of the `master` branch. Things could probably get
a lot simpler when using the default branch. After following the commands in these
examples you can use `git submodule update` and `git submodule update --remote` as normal.

## git-branch-simplify.md

      
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                datagrok
                / git-branch-simplify.md
            
            
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              April 16, 2024 17:26
            
              
                How to simplify the graph produced by git log --graph
              
          
    Ideas for improvements to git log --graph

I will maybe someday get around to dusting off my C and making these changes myself unless someone else does it first.
Make the graph for --topo-order less wiggly

Imagine a long-running development branch periodically merges from master. The
git log --graph --all --topo-order is not as simple as it could be, as of git version 1.7.10.4.
It doesn't seem like a big deal in this example, but when you're trying to follow the history trails in ASCII and you've got several different branches displayed at once, it gets difficult quickly.

  
## boxstarter.ps1
# Description: Boxstarter Script
# Author: Jess Frazelle <jess@linux.com>
# Last Updated: 2017-09-11
#
# Install boxstarter:
# 	. { iwr -useb http://boxstarter.org/bootstrapper.ps1 } | iex; get-boxstarter -Force
#
# You might need to set: Set-ExecutionPolicy RemoteSigned
#
# Run this boxstarter by calling the following from an **elevated** command-prompt:

## k8s-pi.md

      
              3 files
            
          
              74 forks
            
          
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                alexellis
                / k8s-pi.md
            
            
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              April 11, 2024 14:17
            
              
                K8s on Raspbian
              
          
    This guide has moved to a GitHub repository to enable collaboration and community input via pull-requests.
https://github.com/alexellis/k8s-on-raspbian
Alex

  
## dfs-bfs-non-recursive.js
/**
 * Depth-first and Breadth-first graph traversals.
 *
 * In this diff we implement non-recursive algorithms for DFS,
 * and BFS maintaining an explicit stack and a queue.
 *
 * by Dmitry Soshnikov <dmitry.soshnikov@gmail.com>
 * MIT Style license
 */
	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
	# Credit http://stackoverflow.com/a/2514279
	for branch in `git branch -r \| grep -v HEAD`;do echo -e `git show --format="%ci %cr" $branch \| head -n 1` \\t$branch; done \| sort -r
	If you have a huge repository (in size and in history) and want to add a subfolder
	to your project as a submodule you can follow this example to save time and space
	using git's shallow clone and shallow checkout feature. It is a bit more complicated
	in this example because I assume that you want your submodule to track a non-default
	branch, called `mybranch`, instead of the `master` branch. Things could probably get
	a lot simpler when using the default branch. After following the commands in these
	examples you can use `git submodule update` and `git submodule update --remote` as normal.
	# Description: Boxstarter Script
	# Author: Jess Frazelle <jess@linux.com>
	# Last Updated: 2017-09-11
	#
	# Install boxstarter:
	# . { iwr -useb http://boxstarter.org/bootstrapper.ps1 } \| iex; get-boxstarter -Force
	#
	# You might need to set: Set-ExecutionPolicy RemoteSigned
	#
	# Run this boxstarter by calling the following from an elevated command-prompt:
	/**
	* Depth-first and Breadth-first graph traversals.
	*
	* In this diff we implement non-recursive algorithms for DFS,
	* and BFS maintaining an explicit stack and a queue.
	*
	* by Dmitry Soshnikov <dmitry.soshnikov@gmail.com>
	* MIT Style license
	*/