Recently, one of our clients wanted to capture the performance metrics of Tridion in scaled environments and they had some interesting questions for us: Â

Why Selenium

Since the requirements focused on knowing the client-side performance as opposed to server-side, Selenium WebDriver was used to automate browser interactions and measure performance through their Java API. Measuring the load time of dynamic pages is also easy with Selenium Webdriver, making it possible to gather the performance of Tridion’s dynamic content in addition to their static content.

Why JMeter

<dependency> 
  <groupId>org.seleniumhq.selenium</groupId> 
  <artifactId>selenium-java</artifactId> 
  <version>3.141.59</version> 
  </dependency> 
<dependency> 
  <groupId>org.apache.commons</groupId>
  <artifactId>commons-lang3</artifactId> 
  <version>3.8.1</version> 
</dependency>

package com.ad.selenium.loadtesting.test; 
import org.apache.commons.lang3.time.StopWatch; 
import org.openqa.selenium.By; 
import org.openqa.selenium.JavascriptExecutor; 
import org.openqa.selenium.WebDriver;
import org.openqa.selenium.chrome.ChromeDriver; 
import org.openqa.selenium.support.ui.ExpectedCondition; 
import org.openqa.selenium.support.ui.ExpectedConditions; 
import org.openqa.selenium.support.ui.WebDriverWait;
/** 
 * The TridionPageLoadTimer class contains methods for timing automated Tridion 
 * UI browswser page loads. It uses the Selenium WebDriver to drive the Chrome 
 * browser, and gather metrics of the Tridion UI. It contains methods to measure 
 * performance of the various phases of page load times of the Tridion items.
 * @author Content Bloom 
 * @version 1.0 
 *
 */
public class TridionPageLoadTimer { 
    private static final String CHROME_DRIVER_PATH = "C:\\Temp\\chromedriver.exe";
    private static final String ITEM_TOOLBAR_ID = "ItemToolbar"; 
    private static final String SCHEMA_FIELDS_ID = "SchemaBasedFields"; 
    /** 
    * Get the measured the initial page load time and the completed page 
    * load time of a Tridion Component. 
    * @return A string containing the initial page load time of a Component in a 
    * Tridion CM instance and the load time after loading all schema
    * fields of the Component. 
    */
    public String getComponentLoadTime(String componentUrl, final String firstSchemaField){ 
        // Include the location of the ChromeDriver to webdriver.chrome.driver 
        System.setProperty("webdriver.chrome.driver", CHROME_DRIVER_PATH); 
        WebDriver webDriver = new ChromeDriver(); 
        double initialPageLoadTime_Seconds = 0.0D; 
        double finalPageLoadTime_Seconds = 0.0D;
        try { 
            // Initialize initialPageLoad and finalPageLoad for timing 
            // page loads at different phases. 
            StopWatch initialPageLoadTime = new StopWatch(); 
            StopWatch fullyLoadedPageTime = new StopWatch();
            initialPageLoadTime.start(); 
            fullyLoadedPageTime.start(); 
            webDriver.get(componentUrl); 
            WebDriverWait wait = new WebDriverWait(webDriver, 30000); 
            // Wait until the item toolbar of the Component is located.
            // This determines the initial page load time. 
            wait.until(ExpectedConditions.presenceOfElementLocated(By.id( ITEM_TOOLBAR_ID))); 
            initialPageLoadTime.stop();
            // Wait until all schema fields are located. This determines the page is fully loaded.
            wait.until(new ExpectedCondition<Boolean>() { 
                public Boolean apply(WebDriver driver) {
                    String content = (String) ((JavascriptExecutor)driver).
                        executeScript("return document.getElementById('"+ SCHEMA_FIELDS_ID+"').textContent"); 
                    if(content.contains(firstSchemaField)) { 
                        return true; 
                    } else { 
                        return false; 
                    } 
                }
            });         
            fullyLoadedPageTime.stop();
            // Get the initial and fully loaded page time.
            long initialPageLoadTime_ms = initialPageLoadTime.getTime(); 
            initialPageLoadTime_Seconds = initialPageLoadTime_ms / 1000.0d;
            long finalPageLoadTime_ms = fullyLoadedPageTime.getTime(); 
            finalPageLoadTime_Seconds = finalPageLoadTime_ms / 1000.0d;
        } 
        catch (Exception ex){
           ex.printStackTrace();
        } 
        finally{ 
           webDriver.close();
           webDriver.quit(); 
        }  
        return "Initial page load time: " + initialPageLoadTime_Seconds + " seconds. Total page load time: " + finalPageLoadTime_Seconds + " seconds.";
     } 
}