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Performance Engineering, Hardware and cache awareness with algorithm and data structures

1. Parallel Computing Course - Stanford CS149, Fall 2023
2. Performance-Aware Programming Series by Casey Muratori
3. Algorithms for Modern Hardware
4. Computer Systems: A Programmer's Perspective, 3/E - by Randal E. Bryant and David R. O'Hallaron, Carnegie Mellon University
5. Performance Engineering Of Software Systems - am MITOCW course
6. Parallel Programming 2020 by NHR@FAU
7. Cpu Caches and Why You Care

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kubectl with ZSH (oh-my-zsh)

How to configure

Use the following commands to add the kubectl autocomplete to zsh:

mkdir -p ~/.oh-my-zsh/custom/plugins/kubectl-autocomplete/
kubectl completion zsh > ~/.oh-my-zsh/custom/plugins/kubectl-autocomplete/kubectl-autocomplete.plugin.zsh

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// Needs Bun

import biome from './biome.json';

// Extracted from https://biomejs.dev/linter/rules/#recommended-rules
const recommended = (await Bun.file('./recommended.txt').text())
  .split('\n')
  .map((x: string) => x.trim())
  .filter(Boolean);

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Per https://code.google.com/p/v8/codesearch#v8/trunk/src/runtime.cc


%CreateSymbol
%CreatePrivateSymbol
%CreateGlobalPrivateSymbol
%NewSymbolWrapper
%SymbolDescription
%SymbolRegistry
%SymbolIsPrivate

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%GetOptimizationStatus return a set of bitwise flags instead of a single value, to access the value, you need to take the binary representation of the returned value. Now, for example, if 65 is returned, the binary representation is the following:

(65).toString(2).padStart(12, '0');
// 000001000001

Each binary digit acts as a boolean with the following meaning:

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# https://medium.com/google-cloud/node-to-google-cloud-compute-engine-in-25-minutes-7188830d884e
curl -sL https://deb.nodesource.com/setup_10.x | sudo bash -
sudo apt install nodejs

#install dependencies
#https://github.com/GoogleChrome/puppeteer/issues/290#issuecomment-322838700
sudo apt-get install gconf-service libasound2 libatk1.0-0 libc6 libcairo2 libcups2 libdbus-1-3 libexpat1 libfontconfig1 libgcc1 libgconf-2-4 libgdk-pixbuf2.0-0 libglib2.0-0 libgtk-3-0 libnspr4 libpango-1.0-0 libpangocairo-1.0-0 libstdc++6 libx11-6 libx11-xcb1 libxcb1 libxcomposite1 libxcursor1 libxdamage1 libxext6 libxfixes3 libxi6 libxrandr2 libxrender1 libxss1 libxtst6 ca-certificates fonts-liberation libappindicator1 libnss3 lsb-release xdg-utils wget

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# Source:
# https://www.cloudflare.com/ips
# https://support.cloudflare.com/hc/en-us/articles/200169166-How-do-I-whitelist-CloudFlare-s-IP-addresses-in-iptables-

for i in `curl https://www.cloudflare.com/ips-v4`; do iptables -I INPUT -p tcp -m multiport --dports http,https -s $i -j ACCEPT; done
for i in `curl https://www.cloudflare.com/ips-v6`; do ip6tables -I INPUT -p tcp -m multiport --dports http,https -s $i -j ACCEPT; done

# Avoid racking up billing/attacks
# WARNING: If you get attacked and CloudFlare drops you, your site(s) will be unreachable. 
iptables -A INPUT -p tcp -m multiport --dports http,https -j DROP

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<?php
/**
 * WordPress opcache preloading.
 * Requires PHP >= 7.4.
 * 
 * @author Konrad Fedorczyk <contact@realhe.ro>
 * @link https://stitcher.io/blog/preloading-in-php-74
 * 
 * @version 1.0.0
 */

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// pnpm -r -c exec 'node /path/to/machette.js'

const util = require('util');
const exec = util.promisify(require('child_process').exec);
const process = require('process');
const path = require('path');

async function main() {
  const cwd = process.cwd();

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The following is adapted from original instructions at https://www.expressvpn.com/support/vpn-setup/app-for-linux/#install

1. Log in from browser: https://www.expressvpn.com/sign-in
2. Copy activation code to clipboard
3. Download the .deb installation file
4. Go to terminal
5. cd ~/Downloads
6. sudo dpkg -i [installer file]
7. expressvpn activate
8. Paste activation code from clipboard when asked. There is no visual feedback, so be careful to paste only once asked and press enter if need be.