hellerbarde

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

ilyaigpetrov

Comparison of ASP.NET and Node.js for Backend Programming

We will compare ASP.NET and Node.js for backend programming.
Source codes from examples.

Updates

This document was published on 21.09.2015 for a freelance employer. Some changes since then (14.02.2016):

1. Koa.js no longer uses co-routines, it has switched to Babel's async/await. yield and await are used almost in the same way, so I see no point to rewrite the examples.

kamranayub

public class TestingContext {
  private IKernel _kernel;
  
  public TestingContext() {
    
    // create initial Strict mock that can always be setup outside impersonation context
    UserContext = new Mock<IUserContext>(MockBehavior.Strict);
    
    // register dependencies
    _kernel = CreateKernel();

acamino

using System;
using System.Collections.Generic;
using System.Net.Http;
using System.Net.Http.Headers;

namespace HttpClientApproach
{
    internal class Contributor
    {
        public string Login { get; set; }

fataltes

import pandas as pd
import numpy as np

class GCModel:
    def __init__(self):
        self.obs_weights_ = None
        self.exp_weights_ = None
        self.obs_ = None
        self.exp_ = None
        self.dims_ = None

VarunVats9

import java.io.IOException;
import java.net.URL;
import java.nio.file.Files;
import java.nio.file.Paths;
import java.util.ArrayList;
import java.util.BitSet;
import java.util.List;
import java.util.concurrent.ThreadLocalRandom;
import java.util.stream.Stream;

shanselman

using namespace System.Management.Automation
using namespace System.Management.Automation.Language
 
if ($host.Name -eq 'ConsoleHost')
{
    Import-Module PSReadLine
}
#Import-Module PSColors
#Import-Module posh-git
Import-Module -Name Terminal-Icons

scalablescripts

worker_processes  1;

events {
  worker_connections  1024;
}

http {
  server {
    listen 80;
    server_name  localhost;