CODEWITHSUNDEEP
watirwatir-webdriver
MichaelR
MichaelR

Reputation: 999

Watir Measure Page Performance

Ive found this gem : http://watirwebdriver.com/page-performance/

But i cant seem to understand what this measures 

browser.performance.summary[:response_time]/1000

Does it start measuring from the second i open the browser? 

Watir::Browser.new :chrome

or from the last Watir-webdriver command writen?

And how can i set when it starts the timer?

** I've tried several scripts but i keep getting 0 seconds Thats why im not sure.**

Upvotes: 0

Views: 427

Answers (1)

Justin Ko
Justin Ko

Reputation: 46836

From what I have read (I have not actually used it on a project), the response_time is the time from starting navigation to the end of the page loading - see Tim's (the gem's author) answer in a previous question. The graphical image on Tim's blog will helps to understand the different values - http://90kts.com/2011/04/19/watir-webdriver-performance-gem-released/.

The gem is for getting performance results of single response, rather than overall usage of a browser during a script. So there is no need to start/stop the timer.

If you are getting 0 seconds, it likely means that the response_time is less than 1000 milliseconds (ie in Ruby, doing 999/1000 gives 0). To make sure you are getting something non-zero, try doing:

browser.performance.summary[:response_time]/1000.0

Dividing by 1000.0 will ensure that you get the decimal values (eg 0.013).

Upvotes: 6

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