Leonid Shirmanov shirmanov

Libuv and libev, two I/O libraries with similar names, recently had the privilege to use both libraries to write something. Now let's talk about my own subjective expression of common and different points.

The topic of high-performance network programming has been discussed. Asynchronous, asynchronous, or asynchronous. Whether it is epoll or kqueue, it is always indispensable to the asynchronous topic.

Libuv is asynchronous, and libev is synchronous multiplexing IO multiplexing.

Libev is a simple encapsulation of system I/O reuse. Basically, it solves the problem of different APIs between epoll and kqueuq. Ensure that programs written using livev's API can run on most *nix platforms. However, the disadvantages of libev are also obvious. Because it basically just encapsulates the Event Library, it is inconvenient to use. For example, accept(3) requires manual setnonblocking after connection. EAGAIN, EWOULDBLOCK, and EINTER need to be detected when reading from a socket. This is a

k6 performance overview

In order to get a general idea of how k6 is performing, and to see if there are any low-hanging fruit in terms of optimizations we could do, I did a series of tests running k6 against a local server, testing different changes to the k6 code base.

Local environment

macOS High Sierra 10.13.13
MacBook Pro(Retina, 15-inch, Mid 2014)
Processor: 2,2Ghz Intel Core i7
Memory: 16GB 1600MHz DDR3

Loading variables from .env files in Ansible

Ansible has various ways of looking up data from outside sources, including plain text password files, CSV files and INI files. But it doesn't seem to have a lookup for .env files, as used in Laravel projects, also available for PHP, Ruby, Node.js, Python and others.

One option is to launch Ansible with the Ruby dotenv command line script... But that requires Ruby, which seems like overkill to me.

So here is a simpler solution that I use. It consists of:

The .env file itself
A small shell script that loads the .env file into environment variables - ansible-playbook.sh

Advanced Component Patterns

Also, check out Advanced Angular Component Patterns on Egghead!

* Titles subject to change

React	Angular
Introducing Advanced React Component Patterns	00 Introducing Advanced Angular Component Patterns (egghead)
Build a Toggle Component (source)	01 Build a Toggle Component (stackblitz) ([egghead](https:

	public class MultiStream : Stream
	{
	private readonly List<Stream> _streams;

	public MultiStream(params Stream[] streams)
	{
	_streams = streams.ToList();
	}

	public override void Flush()

	using NCrontab;
	using System;
	using Telerik.Sitefinity.Configuration;
	using Telerik.Sitefinity.Services;

	namespace SitefinityWebApp.Custom.Helpers
	{
	/// <summary>
	/// Copied from the internal sitefinity classes
	/// </summary>

	<Query Kind="Program">
	<Reference Relative="bin\Newtonsoft.Json.dll">D:\Data\LINQ\bin\Newtonsoft.Json.dll</Reference>
	</Query>

	void Main()
	{
	// -------------------------
	// To use this application you must download a copy of Newtonsoft.Json.dll, which by default is not bundled with LINQPad.
	// This DLL can be sourced from the NuGet package manager here: https://www.nuget.org/packages/Newtonsoft.Json
	// Note the hardcoded path above, this can be changed to the location of the DLL on your hard drive.

	package main

	import (
	"fmt"

	"github.com/aws/aws-sdk-go/aws"
	"github.com/aws/aws-sdk-go/aws/session"
	"github.com/aws/aws-sdk-go/service/ssm"
	)

	[Unit]
	Description=etcd
	Documentation=https://github.com/coreos/etcd
	Conflicts=etcd.service
	Conflicts=etcd2.service

	[Service]
	Type=notify
	Restart=always
	RestartSec=5s