loosely comparing blocking vs non-blocking

gistfile1.txt

$> time node sandwich.js
-> making a burger for marc
-> making a pb&j for mike
-> making a reuben for shawn
<- shawn's reuben is ready in 1399ms
<- mike's pb&j is ready in 1478ms
<- marc's burger is ready in 3327ms
node sandwich.js  0.08s user 0.02s system 2% cpu 3.431 total
$> time node sandwich.js
-> making a burger for marc
-> making a pb&j for mike
-> making a reuben for shawn
<- marc's burger is ready in 624ms
<- shawn's reuben is ready in 4622ms
<- mike's pb&j is ready in 4796ms
node sandwich.js  0.09s user 0.02s system 2% cpu 4.906 total

sandwiches.js

'use strict';

const order_sandwich = (customer, description, duration) => {
  console.log(`-> making a ${description} for ${customer}`);
  setTimeout(() => {
    console.log(`<- ${customer}'s ${description} is ready in ${duration}ms`);
  }, duration);
}

const customers = ["marc", "mike", "shawn"];
const sandwiches = ["burger", "pb&j", "reuben"];

// javascript doesnt have a `zip` function, so we have to
// hack something like this together
const orders = {};
for(let i = 0; i < customers.length; i++) {
  orders[customers[i]] = sandwiches[i];
}

for(let customer in orders) {
  order_sandwich(customer, orders[customer], Math.floor(Math.random() * 10000));
}

sandwiches.rb

def order_sandwich(customer, description, duration)
  puts "-> making a #{description} for #{customer}"
  sleep duration
  puts "<- #{customer}'s #{description} is ready in #{duration}s"
end

def rand_time
  (Random.rand * 10).floor
end

customers = ["marc", "mike", "shawn"].shuffle
sandwiches = ["burger", "pb&j", "reuben"].shuffle

customers.zip(sandwiches).each do |customer, sandwich|
  order_sandwich(customer, sandwich, rand_time)
end