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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) |

获取旧版本 app 应用

iOS

不越狱

windows

Smart Caps Lock: Remap to Control AND Escape (Linux, Mac, Windows)

把 Caps Lock 變成智慧的 Control 以及 Escape ：

單獨輕按一下就是 Escape 。
若按下時同時按著其他鍵，就會是 Control 。

這應該是 Vim 和 Emacs 的最佳解了！(Emacs? Bash 的快捷鍵就是 Emacs 系列的)

Send Escape if you tap Caps Lock alone.

Problem with VirtualBox 4.3.12

It seems there is some problems between Vagrant 1.6.2 and VirtualBox 4.3.12 (the latest at the time or writing this), switching back to VirutalBox 4.3.6 or VirtualBox 4.3.8 seems to eliminate the problem.

update 1: Try both Vagrant 1.6.2 and VirtualBox 4.3.12 on Mac and they seem to work fine!

update 2: You need to enable Virtual Machine option in your BIOS to make VirtualBox work as expected. Saw someone mention about this in Laravel forum about this and it is true.

Also, Vagrant version should be 1.6.2.

Installing SSHPASS

SSHPass is a tiny utility, which allows you to provide the ssh password without using the prompt. This will very helpful for scripting. SSHPass is not good to use in multi-user environment. If you use SSHPass on your development machine, it don't do anything evil.

Installing on Ubuntu

apt-get install sshpass

	db.getCollection('list').aggregate([
	{
	$facet: {
	"events":[{
	$match: {
	'type': 'Event'
	}
	}],
	"tasks": [{
	$match: {

	// ==UserScript==
	// @name AtlassianTuner
	// @description Custom javascript to inject onto Atlassian's Jira and Confluence to make experience better (at least for me)
	// @namespace https://gist.github.com/lipkau/481342249739847f2d7f8d3099783ce4
	// @author Oliver Lipkau
	// @version 0.10.1
	// @include https://.bsh-sdd.com
	// @require https://code.jquery.com/jquery-2.2.4.min.js#sha256=BbhdlvQf/xTY9gja0Dq3HiwQF8LaCRTXxZKRutelT44=
	// @require https://cdnjs.cloudflare.com/ajax/libs/anchor-js/3.2.2/anchor.min.js#sha256=WofcoLT8gToeaSmVRe28qpnlFxdBJH1n4K6Bk3YowvU=
	// @run-at document-start

	#!/bin/sh

	command="${*}"
	printf "Initialized REPL for `%s`\n" "$command"
	printf "%s> " "$command"
	read -r input
	while [ "$input" != "" ];
	do
	eval "$command $input"
	printf "%s> " "$command"

	<?php
	function toArray($object) {
	$dump = '$dump = '.var_export($object, true);
	$dump = preg_replace('/object\([^\)]+\)#[0-9]+ /', 'array', $dump);
	$dump = preg_replace('/[a-zA-Z_]+::__set_state/', '', $dump);
	$dump = str_replace(':protected', '', $dump);
	$dump = str_replace(':private', '', $dump);
	$dump .= ';';
	eval($dump);
	return $dump;