How to Improve Conversion Rate by Increasing Rendering Speed for Slow Websites
Above-the-fold render time matters more than total page load. Measure the change in conversion, not just the change in milliseconds.
Website and API Monitoring
All articles, page 12 of 13
Newest first. 300 load testing, JMeter, test automation and monitoring guides, plus tool comparisons. Browse by topic from the blog home.
Test Automation
Schedule Mobile Emulation to Run Continuously
Continuous mobile emulation turns a one-off check into a trend you can act on. Alert on regression rather than reviewing every run.
Website and API Monitoring
Speeding Up Selenium WebDriver Tests with Efficient Locators
ID is fastest and most stable; CSS is the practical default when there is no ID.
Cloud Testing
How to Test your Websites in Smartphone & Tablet Mobile Emulators
Emulators catch layout and viewport problems quickly and cheaply. Test the viewports in your analytics rather than a generic device list.
Website and API Monitoring
How to Add UI Steps in a Automated Website Test
UI steps let you script a real journey rather than checking a single URL.
Test Automation
How to Select a Dropdown in Selenium WebDriver using Java
Use the Select class for real select elements, and normal clicks for custom widgets.
Apache JMeter
How to use User Defined Variables in Apache JMeter
How to add User Defined Variables in Apache JMeter, reference them with ${name}, override them from the CLI with -J, and keep environments in one place.
Apache JMeter
How to start Apache JMeter in non-graphical (non-GUI) mode?
Start Apache JMeter from the command line with -n -t -l -e -o, why GUI mode skews results, and how to run the same JMX at scale in the cloud.
Test Automation
How to scroll web page UP or Down using Selenium WebDriver?
Scrolling is done through the JavaScript executor, since WebDriver has no native scroll command.
Website and API Monitoring
5 Tips to Boost Page Speed and Website SEO
Page speed is a ranking factor, so a slow site costs you traffic before anyone reads a word.
Load Testing
Enable gzip compression on NGINX
gzip on NGINX is a few lines of config and usually the cheapest bandwidth win available.
Apache JMeter
How to Use Apache JMeter’s XPath Extractor?
The XPath Extractor pulls values out of an XML or HTML response for use in later requests.
Cloud Testing
How to use assertions in Apache JMeter tests
Assert on content as well as status, since a wrong body is still a failure. Keep assertions cheap. Heavy ones distort the timings you are measuring.
Apache JMeter
How To Use Apache JMeter To Load Test a Web Server
Start with a thread group, an HTTP request and a results file: everything else is refinement. Run from a machine that is not the server under test.
Load Testing
Top 10 Performance Testing Tips and Tricks
Decide what you are measuring and why before configuring anything. Choose the metrics up front, or you will report whatever looks best afterwards.
Test Automation
How to find the XPath of your Selenium WebDriver test using Chrome browser?
Chrome DevTools can copy an XPath, but the generated one is usually position-based and brittle.
Test Automation
How to get all the options in a select tag using Selenium Webdriver
The Select class exposes getOptions() for real select elements. Assert on the option text or value, not the count alone, which passes on the wrong list.
Apache JMeter
Using a CSV file for login credentials and extracting the token from the response when running JMeter tests
A CSV of credentials gives each virtual user a distinct login, which is what makes auth load realistic.
Website and API Monitoring
How to Measure CPU and Memory while Running a Load Test
Response times alone cannot tell you whether the server is saturated or merely waiting.
Apache JMeter
How to install JMeterPlugins-Extras and JMeterPlugins-ExtrasLibs
Extras and ExtrasLibs are a pair, and installing only one is the usual cause of missing elements.
Test Automation
How to Clear Local Storage using Selenium WebDriver?
Clearing cookies does not clear local storage, so state survives between tests. Execute localStorage.clear() through the driver's JavaScript executor.
Test Automation
How to Implement Agile Guidelines and Methodologies
Agile fails on the ceremonies people skip, not on the ones they perform badly.
Test Automation
How to take screenshots with Selenium WebDriver
Screenshots on failure turn an unhelpful stack trace into something you can diagnose. Name files by test and timestamp or you cannot match them to runs.
Test Automation
How to Pass Traffic Through a Proxy with Selenium WebDriver
A proxy lets you inspect, record or modify the traffic a browser test generates. HTTPS needs the proxy certificate trusted or every request fails.
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