Srinivasan Ragothaman rsrini7

Anatomy of Spring Boot Start Up Timing

When a Spring Boot app starts up with default (INFO) logging, there are some noticeable gaps (pauses). It's worth focusing on the gaps when looking for efficiency savings because of the amount of time they take, and because no-one bothered to log anything, so the chances are the app is doing something repetitive. We can tweak the logging levels to try and fill in the gaps and find out what is going on in there.

Basic empty web app with actuators has three such gaps:

0                                                                        1410ms
|------|---------------------------|-----|------|---------|--------|--------|
       |           578             |     |144(5)|         | 133(6) |

HTTP

HTTP 2

Install Ubuntu containers on Archlinux using LXC

Install the lxc and the debootstrap packages:

# pacman -Sy lxc debootstrap

Install an Ubuntu container

I will install Ubuntu 16. Therfore, I will use the xenial release.

RxJS 5 Operators By Example

⚠️ UPDATE: I have moved the contents of this gist plus more to http://www.learnrxjs.io and https://github.com/btroncone/learn-rxjs. For expanded examples, explanations, and resources, please check out this new location!

A complete list of RxJS 5 operators with easy to understand explanations and runnable examples.

Don't use VPN services.

No, seriously, don't. You're probably reading this because you've asked what VPN service to use, and this is the answer.

Note: The content in this post does not apply to using VPN for their intended purpose; that is, as a virtual private (internal) network. It only applies to using it as a glorified proxy, which is what every third-party "VPN provider" does.

A Russian translation of this article can be found here, contributed by Timur Demin.
A Turkish translation can be found here, contributed by agyild.
There's also this article about VPN services, which is honestly better written (and has more cat pictures!) than my article.

problem: existing JS interpeters take up too much RAM to run on tiny chips

solutions:

	import java.util.ArrayList;
	import java.util.List;

	import org.apache.http.conn.ssl.NoopHostnameVerifier;
	import org.apache.http.impl.client.CloseableHttpClient;
	import org.apache.http.impl.client.HttpClients;
	import org.springframework.http.MediaType;
	import org.springframework.http.client.HttpComponentsClientHttpRequestFactory;
	import org.springframework.http.converter.ByteArrayHttpMessageConverter;
	import org.springframework.web.client.RestTemplate;

	<requestHandler name="/select" class="solr.SearchHandler">
	<lst name="defaults">
	<str name="echoParams">explicit</str>
	<int name="rows">10</int>
	<!-- Spellcheck default. Solr will use suggestions from both the 'default' spellchecker
	and from the 'wordbreak' spellchecker and combine them.
	collations (re-written queries) can include a combination of
	corrections from both spellcheckers -->
	<str name="spellcheck.dictionary">default</str>
	<str name="spellcheck.dictionary">wordbreak</str>

	package com.kishan;

	import java.io.IOException;
	import java.nio.file.Files;
	import java.nio.file.Path;
	import java.nio.file.Paths;
	import java.util.Scanner;

	public class BakFileDestroyer
	{

	#!/bin/bash
	## Install Golang Stable 64Bits on Linux (Debian\|Ubuntu\|OpenSUSE\|CentOS)
	## https://www.linuxpro.com.br/2015/06/golang-aula-1-instalacao-da-linguagem-no-linux.html
	## Run as root (sudo su)
	## Thank's @geosoft1 \| @gwmoura


	GO_URL="https://go.dev/dl"
	GO_VERSION=$(curl -s 'https://go.dev/VERSION?m=text'\|head -n1)
	GO_FILE="$GO_VERSION.linux-amd64.tar.gz"