No tool is perfect for everything. Knowing when NOT to use a tool is just as important as knowing when to use it. Here is the honest picture.
Q: Can Playwright do performance testing?
A: Playwright can measure page load times and capture performance metrics using the Chrome DevTools Protocol, but it is NOT a load testing tool. It runs one browser at a time. For load testing -- simulating thousands of concurrent users -- use tools like k6, JMeter, or Gatling. Playwright is for functional correctness, not for stress testing servers.
Key Point: Playwright is for web UI testing. For mobile apps, desktop apps, or load testing, use specialized tools.