Quote:A security feature that is built into Windows 10 makes Chromium-based browsers more than three times slower on testing environments, as revealed by a Vivaldi developer.
 
Yngve Pettersen explains in a blog post that the issue was discovered when adding Windows 10 testers to the Windows unit test cluster, which until that point was entirely based on Windows 7 Pro.
 
“We immediately noticed performance problems. A test suite that previously took about 100 minutes to run, now took 300 or even 360 minutes. We tried fixing the problem by tweaking the OS configuration, replacing drivers, and adjusting the virtual machine’s configuration. Nothing helped, and we went back to the old Windows 7 Pro instance,” he says.
 
After trying several workarounds, such as installing new SSDs for further tests, going back to Windows 7 was pretty much the only thing that worked to improve testing performance.
 
“It was definitely not the VM environment. One of the tests that took 100 minutes when run on Windows 10 on this machine, took 20 (twenty!) minutes on Windows 7,” the developer of Vivaldi, which is a browser running on Chromium, explains.