title: How to simulate 20 users click a button at the same time in Web GUI Test Automation
body: <p>Now I hava a requirement about Web GUI TA</p>
  
  <p>I want to simulate some users(20-30) click a button at the same time and evaluate the performance of Web GUI at that time.</p>
  
  <p>I use RobotFrameWork + Selenium library to do the Web Gui TA before, but as far as I know. selenium library only can handle one broswer at one time, so i dont know how to do now.</p>
  
  <p>Can you give me some advice? need use another library or framework?</p>