jgaskins

#!/usr/bin/env bash

# Install nginx ingress controller
# NOTE: This uses DigitalOcean. If you use another Kubernetes provider,
# substitute the appropriate command from here: https://kubernetes.github.io/ingress-nginx/deploy/#cloud-deployments
kubectl apply -f https://raw.githubusercontent.com/kubernetes/ingress-nginx/controller-v1.5.1/deploy/static/provider/do/deploy.yaml

# FOR DIGITALOCEAN DEPLOYMENTS:
export LB_HOSTNAME=example.com # Make this the DNS name that will point to your LB
export LB_NAME=my-lb # Give this a useful name to identify it on the DigitalOcean control panel

jgaskins

#!/usr/bin/env bash

# Fill out these two
export LB_HOSTNAME=example.com
export LB_NAME=my-lb

echo '{"metadata":{"annotations":{"service.beta.kubernetes.io/do-loadbalancer-hostname":"$LB_HOSTNAME","service.beta.kubernetes.io/do-loadbalancer-name":"$LB_NAME"}}}' |
  envsubst |
  awk "{ print \"'\" \$1 \"'\" }" |
  xargs kubectl patch svc -n ingress-nginx ingress-nginx-controller -p

jgaskins

# Experiment with macros to allow for project-local requires
# https://forum.crystal-lang.org/t/project-relative-require/4617

{% begin %}
  ROOT = "{{system("pwd").strip.id}}"
{% end %}
macro spec(file)
  macro load_spec
    \{% path = __DIR__.gsub(%r{\A{{ROOT.id}}}, "").gsub(%r{[^/]+}, "..").id %}
    require "\{{path[1..]}}/spec/{{file.id}}"

jgaskins

require "http"
require "json"
require "uuid/json"
require "db"
require "interro" # github: jgaskins/interro
require "faker"   # github: askn/faker

ES = ElasticSearch::Client.new
pg = DB.open("postgres:///")
Interro.config { |c| c.db = pg }

jgaskins

class ImmutableEachArray(T)
  include Enumerable(T)

  @iterating = Atomic(Int32).new(0)
  @array = Array(T).new

  def <<(value : T) : self
    raise CannotMutateWhileIterating.new("you iteratin bruh") if @iterating.get > 0

    @array << value

jgaskins

Drivers

Name	Description
ruby	The redis gem with the plain-Ruby driver
hiredis	The redis gem with the hiredis driver (compiled as a C extension)
myredis	Pure-Ruby, optimized for the specific operation

Benchmarks

jgaskins

require 'bundler/inline'

require 'socket'
class MyRedis
  CRLF = "\r\n"

  def initialize
    @connection = TCPSocket.new('localhost', 6379)
    @connection.sync = false
  end

jgaskins

require "http"

require "./route"

class App
  include HTTP::Handler
  include Route

  def call(context)
    route context do |r, response|

jgaskins

require "benchmark"

value = nil
Benchmark.ips do |x|
  x.report "1 ivar" { value = OneIVar.new }
  x.report "2 ivars" { value = TwoIVars.new }
  x.report "4 ivars" { value = FourIVars.new }
  x.report "8 ivars" { value = EightIVars.new }
  x.report "16 ivars" { value = SixteenIVars.new }
end

jgaskins

require "benchmark"

int = 0
[1, 12, 1234, 12345678, 1234567812345678].each do |number|
  puts "Parsing #{number}..."
  io = IO::Memory.new
  io << ":#{number}\r\n" # Redis integer format
  io.rewind

  Benchmark.ips do |x|