TaopaiC TaopaiC

Faster Rails tests

Feedback loop speed in one of the biggest contributing factors to overall development time. The faster you get results, the faster you can move on to other things. A fast enough test suite is therefore critical to teams' success, and is worth investing some time at the beginning to save in the long run.

Below is a list of techniques for speeding up a Rails test suite. It is not comprehensive, but should definitely provide some quick wins. This list of techniques assumes you're using minitest, but most everything should translate over to rspec by simply replacing test/test_helper.rb with spec/spec_helper.rb.

Lead with data
bcrypt
bootsnap
Cache Time::utc calls

A quick note on how I'm currently handling Blue/Green or A/B deployments with Terraform and AWS EC2 Auto Scaling.

In my particular use case, I want to be able to inspect an AMI deployment manually before disabling the previous deployment.

Hopefully someone finds this useful, and if you have and feedback please leave a comment or email me.

Overview

I build my AMI's using Packer and Ansible.

	#!/bin/bash
	set -e

	##
	# Usage:
	#
	# $0 [cluster name] [user name] [output dir]
	##

	usage()

	<?php

	/******* CONFIG ******/
	$clusterEndpoint = "";
	$clusterPort = 3306;
	$clusterRegion = "us-east-1";
	$dbUsername = "";
	$dbDatabase = "";
	/*************************/

	import os

	import boto.utils
	import boto3
	import requests
	import datetime
	import time


	def get_contents(filename):

	#!/usr/bin/env bash
	set -e

	function usage() {
	set -e
	cat <<EOM
	##### ecs-run #####
	Simple script for running tasks on Amazon Elastic Container Service
	One of the following is required:
	Required arguments:

	$ VBoxManage list usbhost
	Host USB Devices:

	...

	UUID: 248ee848-3d9e-47cc-96d7-779e54946e39
	VendorId: 0x0bda (0BDA)
	ProductId: 0x0169 (0169)
	Revision: 97.35 (9735)
	Port: 1

	const I = x => x
	const K = x => y => x
	const A = f => x => f (x)
	const T = x => f => f (x)
	const W = f => x => f (x) (x)
	const C = f => y => x => f (x) (y)
	const B = f => g => x => f (g (x))
	const S = f => g => x => f (x) (g (x))
	const S_ = f => g => x => f (g (x)) (x)
	const S2 = f => g => h => x => f (g (x)) (h (x))

	// This gist is deprecated, doesn't work with newer versions of JSDom.
	// Instead, use https://www.npmjs.com/package/highcharts-jsdom