web_performo¶ ↑

• github.com/moowahaha/WebPerformoTheMagnificent

Library to allow you to time and compare website performance. Built out of a project requirement that new websites should not run any slower than the old websites.

The measurements taken are the time it takes for the first byte to be received from the web server and the time taken for a page to render in a given browser.

Getting the performance statistics of a given URL:

performo = WebPerformo.new('firefox')
performo.run('http://www.google.com')

# high precision seconds taken to return the first byte from the web server
performo.first_byte_speed  #=> 3.189367457887645

# high precision seconds taken to render the page in a browser
performo.render_speed      #=> 6.34988954874875

Compare the performance of two sites:

performo = WebPerformo.new()

fast_site = performo.run('http://www.fastsite.com')
slow_site = performo.run('http://www.slowsite.com')

if slow_site > fast_site
  puts "slow site is slower than a fast site (obviously)"
end

Make an assertion about website performance:

performo = WebPerformo.new()

fast_site = performo.run('http://www.fastsite.com')
slow_site = performo.run('http://www.slowsite.com')

fast_site.assert > slow_site #=> exception!
slow_site.assert < fast_site #=> exception!

fast_site.assert < slow_site #=> true
slow_site.assert > fast_site #=> true

When comparing, remember that we’re comparing time elapsed. So…

slow_site_stats > fast_site_stats #=> true
fast_site_stats < slow_site_stats #=> true

slow_site_stats < fast_site_stats #=> false
fast_site_stats > slow_site_stats #=> false

• selenium-webdriver >= 0.0.18

• sudo gem install web_performo

Copyright © 2010 Stephen Hardisty

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