bitcodr

Core System Latencies

Operation                                    Latency        Human Scale*
═══════════════════════════════════════════════════════════════════════
L1 cache reference                           0.5 ns        1 second
Branch mispredict                            5   ns        10 seconds
L2 cache reference                           7   ns        14 seconds
Mutex lock/unlock                           25   ns        50 seconds
Main memory reference                      100   ns        3.3 minutes

bitcodr

Overview

Internet connection and DNS routing are broken from WSL2 instances, when some VPNs are active. The workaround breaks down into two problems:

1. Network connection to internet
2. DNS in WSL2

This problem is tracked in multiple microsoft/WSL issues including, but not limited to:

• microsoft/WSL#5068

bitcodr

#!/bin/bash
set -e

export CONFIG_MODULE_SIG=n
export CONFIG_MODULE_SIG_ALL=n
# For current kernel
export KERNELRELEASE=$(cat /proc/version | awk '{print $3}')

temp_dir=$(mktemp -d)
echo "Installing FacetimeHD camera for $KERNELRELEASE"

bitcodr

// 1 - go to this page https://www.linkedin.com/feed/following/
// 2 - open browser console past the code as below and click Run

var buttons = $("button"),
 interval = setInterval(function(){
 var btn = $('.is-following');
 var v =  document.querySelectorAll("p.follows-recommendation-card__headline");
	
   for(y in v)
  {

bitcodr

if empty(glob('~/.config/nvim/autoload/plug.vim'))
  silent !curl -fLo ~/.config/nvim/autoload/plug.vim --create-dirs
    \ https://raw.githubusercontent.com/junegunn/vim-plug/master/plug.vim
  autocmd!
  autocmd VimEnter * PlugInstall
endif

call plug#begin('~/.config/nvim/plugged')
"File Search:
Plug 'ctrlpvim/ctrlp.vim' " fuzzy find files

bitcodr

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

bitcodr

db.item_01.find().snapshot().forEach(
...     function (elem) {
...         db.item_01.update(
...             {
...                 _id: elem._id
...             },
...             {
...                 $set: {
...                     type: elem.attr_values[1]
...                 }

bitcodr

public function rules()
{
    $user = User::find($this->users);
 
    switch($this->method())
    {
        case 'GET':
        case 'DELETE':
        {
            return [];