Danny danhyun

Ratpack Production Tunings

# cat /etc/security/limits.conf

*         hard    nofile      500000
*         soft    nofile      500000
root      hard    nofile      500000
root      soft    nofile      500000

Hello, visitors! If you want an updated version of this styleguide in repo form with tons of real-life examples… check out Trellisheets! https://github.com/trello/trellisheets

Trello CSS Guide

“I perfectly understand our CSS. I never have any issues with cascading rules. I never have to use !important or inline styles. Even though somebody else wrote this bit of CSS, I know exactly how it works and how to extend it. Fixes are easy! I have a hard time breaking our CSS. I know exactly where to put new CSS. We use all of our CSS and it’s pretty small overall. When I delete a template, I know the exact corresponding CSS file and I can delete it all at once. Nothing gets left behind.”

You often hear updog saying stuff like this. Who’s updog? Not much, who is up with you?

starting the app

* app starts with `-Dratpack.epoll=true` to enable the Netty `EpollEventLoop`

# ./wrk -t72 -c3000 -d30s http://localhost:5050
Running 30s test @ http://localhost:5050
  72 threads and 3000 connections
  Thread Stats   Avg      Stdev     Max   +/- Stdev
    Latency     4.82ms    9.03ms 229.22ms   95.25%
    Req/Sec     9.58k     3.52k   34.54k    70.33%

Grab ffmpeg from https://www.ffmpeg.org/download.html

It's a command line tool which means you will have to type things with your keyboard instead of clicking on buttons.

The most trivial operation would be converting gifs:

ffmpeg -i your_gif.gif -c:v libvpx -crf 12 -b:v 500K output.webm

-crf values can go from 4 to 63. Lower values mean better quality.
-b:v is the maximum allowed bitrate. Higher means better quality.

	package com.example

	import liquibase.Contexts;
	import liquibase.LabelExpression;
	import liquibase.Liquibase;
	import liquibase.database.Database;
	import liquibase.database.DatabaseFactory;
	import liquibase.database.jvm.JdbcConnection;
	import liquibase.resource.FileSystemResourceAccessor;
	import org.jooq.DSLContext;

	Mute these words in your settings here: https://twitter.com/settings/muted_keywords

	ActivityTweet
	generic_activity_highlights
	generic_activity_momentsbreaking
	RankedOrganicTweet
	suggest_activity
	suggest_activity_feed
	suggest_activity_highlights
	suggest_activity_tweet

	package foo

	@Grab('org.spockframework:spock-core:1.0-groovy-2.3')

	import org.junit.runner.*

	import spock.lang.Specification
	import spock.util.EmbeddedSpecRunner

	/*

	task srcZip(type:Zip) {
	appendix = 'gitsources'
	from project.projectDir

	doFirst {
	Set excludeList = [relativePath(archivePath).toString()]

	def p = "git status --ignored --porcelain .".execute([], project.projectDir)
	def writer = new StringWriter()
	p.consumeProcessOutput(writer, null)

	buildscript {
	repositories {
	jcenter()
	}

	dependencies {
	classpath 'org.asciidoctor:asciidoctor-gradle-plugin:1.5.2'
	classpath 'org.asciidoctor:asciidoctorj-pdf:1.5.0-alpha.6'
	classpath 'com.github.jruby-gradle:jruby-gradle-plugin:0.1.11'
	classpath 'com.github.ben-manes:gradle-versions-plugin:0.7'

	<!doctype html>
	<html lang="en">
	<head>
	<meta charset="utf-8">
	<title>MTA Fare Calculator</title>
	<link rel="stylesheet" href="http://netdna.bootstrapcdn.com/bootstrap/3.0.2/css/bootstrap.min.css">
	</head>
	<body>
	<div class="container">
	<div class="header">