felipeelias

const SegfaultHandler = require('segfault-handler');
SegfaultHandler.registerHandler('crash.log');

const { PrismaClient } = require('@prisma/client');

async function main() {
  const prisma = new PrismaClient();
  const { id } = await prisma.notification.create({ data: { to: "test@example.com" } });
  console.log(id)
}

felipeelias

# threads dying on fork examples. run with:
#   ruby main.rb
# or
#   ruby main.rb fork
#
require 'thread'

class Worker
  def initialize
    @thread = Thread.new { work }

felipeelias

class Chromosome
  SIZE = 10

  attr_reader :value

  def initialize(value)
    @value = value
  end

  def fitness

felipeelias

require "ecr"

class Greeting
  # def wrap(tag)
  #   String.build do |str|
  #     str << "<#{tag}>"
  #     str << yield
  #     str << "</#{tag}>"
  #   end
  # end

felipeelias

Engineering

Load Balancers

Overview

• Building a Billion User Load Balancer @facebook

Techniques

felipeelias

Keybase proof

I hereby claim:

• I am felipeelias on github.
• I am felipeelias (https://keybase.io/felipeelias) on keybase.
• I have a public key ASCXvgXFgRDO3gzYvfR9Q2V2K9pra4RL5kv-r8M3EoKmfQo

To claim this, I am signing this object:

felipeelias

defmodule Pubsub do
  use Application

  def start(_type, _options) do
    import Supervisor.Spec

    IO.puts("Initializing Pubsub app on #{inspect self}")

    children = [
      worker(Pubsub.Server, [], [name: :server_supervisor])

felipeelias

package main

import (
	"fmt"
	"math/rand"
	"sync"
	"time"
)

var wg sync.WaitGroup

felipeelias

LaundryMachine washer = getLaundryMachine();
washer.open();

List<Unerdwear> pileOfUnerdwear = gatherUnerdwear();
for (Unerdwear underwear : pileOfUnerdwear) {
  if (underwear.isDirty() OR underwear.isSticky()) {
    washer.load(underwear);
  } else {
    putOn(underwear);
    while (undewear.isntDirty()) {

felipeelias

RSpec.configure do |config|
  config.around do |example|
    # For examples using capybara-webkit for example.
    # Remove this if you don't use it or anything similar
    if example.metadata[:js]
      example.run

      ActiveRecord::Base.connection.execute("TRUNCATE #{ActiveRecord::Base.connection.tables.join(',')} RESTART IDENTITY")
    else
      ActiveRecord::Base.transaction do