How to find the Browser rendering time for API in jmeter overall response time?



  • I have to do a performance test for application(It has UI) ,It has API requests ,how to find the browser rendering time for APIs , can we do it with retrieve embedded resource. I am quite new to this ,Can someone please guide me.



  • Not really, as per JMeter project main page:

    JMeter is not a browser, it works at protocol level. As far as web-services and remote services are concerned, JMeter looks like a browser (or rather, multiple browsers); however JMeter does not perform all the actions supported by browsers. In particular, JMeter does not execute the Javascript found in HTML pages. Nor does it render the HTML pages as a browser does (it's possible to view the response as HTML etc., but the timings are not included in any samples, and only one sample in one thread is ever displayed at a time).

    The only way to measure browser rendering time is using a real browser, if you want to do this along with the existing JMeter performance tests - go for WebDriver Sampler, it provides JMeter integration with Selenium browser automation framework so you will be able to kick off a real browser and measure its rendering time (response time of the WebDriver Sampler will be the time from opening the page till the rendering finishes.

    If you need the breakdown - consider using Navigation Timing API



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