andriisoldatenko

Latency Comparison Numbers
--------------------------
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

bastman

Docker - How to cleanup (unused) resources

Once in a while, you may need to cleanup resources (containers, volumes, images, networks) ...

delete volumes

// see: https://github.com/chadoe/docker-cleanup-volumes

$ docker volume rm $(docker volume ls -qf dangling=true)

$ docker volume ls -qf dangling=true | xargs -r docker volume rm

joanpau

/**
 * Test if idle probes are blocking or not.
 * 
 * Build dynamic pipeline made of a videotestsrc and an autovideosink, 
 * and add/remove a dummy idle probe (print a message) every 5 seconds.
 * 
 * Probes of type GST_PAD_PROBE_TYPE_IDLE are described as blocking
 * in the design documents [1] and the reference documentation [2],
 * so that they block the pad until the probe is removed.
 * But it seems that they just block the pad during the execution of the 

cvrebert

Currently considering https://github.com/webdriverio/webdrivercss

---

Core Goals:

• Can test in up-to-date versions of all major browsers
• Can test on up-to-date versions of all major OSes
• Can test in IE9 (because Bootstrap v4 will support IE9+)
• Don't want to have to setup/maintain our own cluster of VMs running all the necessary OSes (and all the versions of Windows)
• Workflow for management of reference/baseline/norm screenshots

tsiege

ANNOUNCEMENT

I have moved this over to the Tech Interview Cheat Sheet Repo and has been expanded and even has code challenges you can run and practice against!






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julionc

How to install PhantomJS on Ubuntu

Version: 1.9.8

Platform: x86_64

First, install or update to the latest system software.

sudo apt-get update
sudo apt-get install build-essential chrpath libssl-dev libxft-dev

dwayne

Problem: What does a Modern Front-End Development Workflow Look Like?

I want to start writing libraries and large applications using the JavaScript language. However, I don't know how to setup the project and which build tools to use. What I do know is that the JavaScript community has moved way beyond using browser developer tool plugins and strategically-placed console.log() statements to debug, test, and build code.

I need help.

Below, I will keep track of articles, tutorials and tools I come across as I search for a way to bring my front-end development chops up-to-date.

The Ultimate Resource

umputun

#!/usr/bin/python
# -*- coding: utf-8 -*-

import web, json, time, mpd, collections

STATIONS =  {
    "FoxNews" : "mmsh://209.107.209.181:80/D/138/13873/v0001/reflector:24137?MSWMExt=.asf",
    "Classic" : "http://radio02-cn03.akadostream.ru:8100/classic128.mp3",
    "Jazz": "http://streaming208.radionomy.com:80/A-JAZZ-FM-WEB"
}

i-e-b

using System;
using System.Collections.Generic;
using System.Runtime.InteropServices;
using System.Diagnostics;
using System.Text;
using System.Threading;

namespace FileLockInfo
{
    public class Win32Processes

jstangroome

param ($InstallPath, $ToolsPath, $Package, $Project)

Add-Type -Language CSharpVersion3 -TypeDefinition @'
public class MyPackage {
    public static void Execute(string installPath, string toolsPath, object package, object Project) {
        // implement Nuget init, install, uninstall script as C#
        System.Console.WriteLine(installPath);
    }
}
'@