Watir - Page Performance


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Watir Page performance feature allows you to track the response time metrics and it works fine in Chrome, Firefox, IE9 and above. Safari browser does not have the support as of now.

Let us take a closer look on how to use this feature. To make use of it, we need to install watir-performance using gem as shown below −

Command

gem install watir-performance
Watir Performance

We are done with installing watir-performance. The metrics that are supported are −

  • summary
  • navigation
  • memory
  • Timing

A working example using watir-performance is discussed here. Here, we will check the response time for site − www.tutorialspoint.com as shown below −

require 'watir'
require 'watir-performance'
10.times do
   b = Watir::Browser.new :chrome
   b.goto 'https://www.tutorialspoint.com'
   load_secs = b.performance.summary[:response_time] / 1000
   puts "Load Time: #{load_secs} seconds."
   b.close
end

output

Load Time: 7 seconds.
Load Time: 7 seconds.
Load Time: 5 seconds.
Load Time: 5 seconds.
Load Time: 6 seconds.
Load Time: 5 seconds.
Load Time: 5 seconds.
Load Time: 13 seconds.
Load Time: 12 seconds.
Load Time: 5 seconds.

Using performance.timing

require 'watir'
require 'watir-performance'

b = Watir::Browser.new :chrome
b.goto 'https://www.tutorialspoint.com'
load_secs = b.performance.timing[:response_end] - b.performance.timing[:response_start]
puts "Time taken to respond is #{load_secs} seconds."
b.close

output

Time taken to respond is 41 seconds.

Using performance.navigation

require 'watir'
require 'watir-performance'

b = Watir::Browser.new :chrome
b.goto 'https://www.tutorialspoint.com'
perf_nav = b.performance.navigation
puts "#{perf_nav}"
b.close

output

{:type_back_forward=>2, :type_navigate=>0, :type_reload=>1, 
:type_reserved=>255, :redirect_count=>0, :to_json=>{}, :type=>0}

Using performance.memory

require 'watir'
require 'watir-performance'

b = Watir::Browser.new :chrome
b.goto 'https://www.tutorialspoint.com'
memory_used = b.performance.memory
puts "#{memory_used}"
b.close

output

{:js_heap_size_limit=>2, :type_navigate=>0, :type_reload=>1, :ty2136997888, 
:total_js_heap_size=>2, :type_navigate=>0, :type_reload=>1, :ty12990756, 
:used_js_heap_size=>2, :type_navigate=>0, :type_reload=>1, :ty7127092}
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