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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

larrynung

# Optimized my.cnf configuration for MySQL/MariaSQL on cPanel/WHM servers
#
# by Fotis Evangelou, developer of Engintron (engintron.com)
#
# === Updated December 2018 ===
#
# The settings provided below are a starting point for a 2GB - 4GB RAM server with 2-4 CPU cores.
# If you have less or more resources available you should adjust accordingly to save CPU,
# RAM and disk I/O usage.
# The settings marked with a specific comment or the word "UPD" after the value

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#!/usr/bin/perl
#
# mysqldump -routines --no-create-info --no-data --no-create-db --compact | perl $0

use strict;
use warnings;
use utf8;

my $output_dir = "out";

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#!/bin/bash
# Simple inspector for Docker container IP address
# https://gist.github.com/mugifly/3bb1c54b48764340eda8

print_help () {
    echo -e "USAGE: docker-container-ip.sh KEYWORD\n"
    echo "KEYWORD: A keyword string for target container."
    echo "    e.g. dokku.mysql.foobar"
    echo -e "\n[Example usecases]"
    echo "  Connect to MySQL database in container:"

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#!/bin/bash -eu
#
# This script can sync MySQL schema without `DROP TABLE`.
# And If table isn't exists, import tables from source.
#
# Finally there is a confirmation screen.
#
# Need these packages: mysql, mysqldump, mysqldiff
# GitHub: @rluisr

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Commit Message Conventions

These rules are adopted from the AngularJS commit conventions.

• Goals
• Generating CHANGELOG.md
  • Recognizing unimportant commits
  • Provide more information when browsing the history
• Format of the commit message
• Subject line

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using System;

namespace StackExchange.Redis
{
    static class RedisKeyspaceNotifications
    {
        /// <summary>
        /// NOTE: For this sample to work, you need to go to the Azure Portal and configure keyspace notifications with "Kxge$" to
        ///       1) turn on expiration notifications (x), 
        ///       2) general command notices (g) and 

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Download courses from learning sites with youtube-dl

You can download whole courses from an array of tutorial sites with the CLI tool youtube-dl. In the example further down I'm using my Pluralsight account to get videos from a course at their site. Here is a list of all supported sites that you can download from with this tool

The flags you have to supply may vary depending on which site you make a request to.

You can get a free 3 month trial to Pluralsight by signing up for free to Visual Studio Dev Essentials

Installation

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1. Install Docker CE and enable Kubernetes:
   See Figure 1 and 2 in https://medium.com/slalom-technology/get-kubernetes-running-locally-on-osx-and-windows-b3b5f176b5bb
   
2. (Optionally) Install k8s dashboard:

   ```
   $ kubectl apply -f https://raw.githubusercontent.com/kubernetes/dashboard/master/src/deploy/recommended/kubernetes-dashboard.yaml

   $ kubectl proxy
   ```

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type MethodDecorator = (target: any, propertyKey: string | symbol, descriptor: TypedPropertyDescriptor) =>
    TypedPropertyDescriptor | void;

type AssertFn = (...args: Array<any>) => void;

class TSContract {
    private static isCustomContractInterruptionCb: boolean = false;

    private static contractInterruptionCb(message: string): void {
        console.warn(message);