evaneykelen

[Published March 16th 2006, https://web.archive.org/web/20061127141948/http://www.bitgain.com:80/blog/show/5]

While driving from my home town (Hoorn, The Netherlands) to Amsterdam, I saw a lot of cars with the small TomTom device mounted (with Velcro, mind you) on top of the dashboard. Although it looks a bit amateurish, many people really seem to like the driving directions it gives.

I wonder whether companies like TomTom, or its rival Garmin, can uphold the outrageous pricing level of their products. The avarage TomTom device costs a whopping EUR 600 and for what? The components inside the device cost no more than $80 I guess. And of course TomTom must license the map data from Navteq or TeleAtlas, and they have to finance expensive marketing campaigns (also in the US since a few months).

I'm always a sucker for scenarios in which a whole vertical market gets beaten by a killer app. I think the GPS device market runs such a risk. Bear with me for a moment:

• The TomTom software adds no spectacular value

evaneykelen

{
    "Statement": [
        {
            "Effect": "Allow",
            "Action": [
                "s3:ListAllMyBuckets",
                "s3:GetBucketLocation"
            ],
            "Resource": "arn:aws:s3:::*"
        },

evaneykelen

{
    "Version": "2012-10-17",
    "Id": "Policy154...",
    "Statement": [
        {
            "Sid": "Stmt1542...",
            "Effect": "Allow",
            "Principal": {
                "AWS": "arn:aws:iam::744...556:user/s3-user"
            },

evaneykelen

{
  "Version": "2012-10-17",
  "Id": "Policy154...",
  "Statement": [
    {
      "Sid": "Stmt15420...",
      "Effect": "Allow",
      "Principal": {
        "AWS": "arn:aws:iam::744...556:user/s3-user"
      },

evaneykelen

require 'open3'

class Sqs

  def self.process_messages
    sqs = Aws::SQS::Client.new(region: ENV.fetch("AWS_REGION"),
                               access_key_id: ENV.fetch("AWS_ACCESS_KEY_ID"),
                               secret_access_key: ENV.fetch("AWS_SECRET_ACCESS_KEY"))
    queue_url = sqs.get_queue_url(queue_name: ENV.fetch("AWS_SQS_QUEUE_NAME")).queue_url
    poller = Aws::SQS::QueuePoller.new(queue_url, { client: sqs })

evaneykelen

Keybase proof

I hereby claim:

• I am evaneykelen on github.
• I am hackteck (https://keybase.io/hackteck) on keybase.
• I have a public key whose fingerprint is BBC4 19FF C4B7 281D C2F8 5331 CEBA 9715 B32B C1C5

To claim this, I am signing this object:

evaneykelen

require 'benchmark'

array = File.readlines('dutch.bin') # 10k lines

Benchmark.bmbm do |x|
  x.report {
    x.report("tr") { array.each { |line| line.tr('e', 'z') } }
  }
end

evaneykelen

require 'benchmark'

array = File.readlines('dutch.bin') # 10k lines
hash = Hash[*array] # 5k keys => 5k values

Benchmark.bmbm do |x|
  x.report {
    x.report("Array count") { 10_000.times { array.count } }
    x.report("Array size") { 10_000.times { array.size } }
    x.report("Hash count") { 10_000.times { hash.count } }

evaneykelen

require 'benchmark'
require 'set'

array = File.readlines('dutch.bin') # 10k lines
hash = Hash[*array] # 5k keys => 5k values
set = array.to_set # 10k entries
line = array[-1] # Last line

Benchmark.bmbm do |x|
  x.report("Array.include?") { 10_000.times { array.include?(line)} }

evaneykelen

This script has been turned into a Ruby gem: https://github.com/evaneykelen/colrou