ruby csv parser memory test

config.rb

class Config
  class << self
    def get
      env = ENV["RUBY_ENV"] || "developement"
      env = env.downcase

      require_relative "./environments/" + downcase
    end
  end
end

csvparser.rb

require_relative './helpers'
require 'csv'

print_memory_usage do
  print_time_spent do
    csv = CSV.open('./data/test_data.csv')

    csv.drop(13).each do |row|
      p row
    end

    CSV.foreach('./data/test_data.csv') do |row|
      p row
    end
  end
end

helpers.rb

require 'benchmark'

def print_memory_usage
  memory_before = `ps -o rss= -p #{Process.pid}`.to_i
  yield
  memory_after = `ps -o rss= -p #{Process.pid}`.to_i

  puts "Memory: #{((memory_after - memory_before) / 1024.0).round(2)} MB"
end

def print_time_spent
  time = Benchmark.realtime do
    yield
  end

  puts "Time: #{time.round(2)}"
end

test_data.csv

Report,Reviews
App ID,com.gojek.app
App,GO-JEK
Version,All Versions
Market,Google Play
Language,All Languages
Total Reviews,6603
Average Rating,3.5
Search Term,
Start Date,08/13/2016
End Date,09/12/2016
Date Generated,09/14/2016 00:50:51 PDT

Platform,Language,Date,App ID,App Name,Publisher ID,Publisher Name,User,Version,Rating,Title,Review
Google Play,English,09/12/2016,com.gojek.app,GO-JEK,20200000891258,PT GO-JEK INDONESIA,,,1,," Saldo saya hilang, padahal saya sebelumnya top up 2x dan belum terpakai "
Google Play,English,09/12/2016,com.gojek.app,GO-JEK,20200000891258,PT GO-JEK INDONESIA,,,4,Rew, Dwwww 
Google Play,English,09/12/2016,com.gojek.app,GO-JEK,20200000891258,PT GO-JEK INDONESIA,,,2,A little bit disappointed," Cari driver lsg ""booking in progress"", tp ditunggu 15menit gk dtg. Ditelp gk diangkat. Cancel booking trus find lg, ditlp gk diangkat jg pdhl beda driver. Cukup. "
Google Play,English,09/12/2016,com.gojek.app,GO-JEK,20200000891258,PT GO-JEK INDONESIA,,,5,Smart, Very Easy take something 

File.open('./data/test_data.csv') do |io|
  nil until io.gets == "\n"

  csv = CSV.new(io, headers: true)
  csv.each do |row|
    p row
  end
end