I don't have numbers handy, but I didn't notice any significant performance difference between headless and headed chrome. I think the main benefit of headless

I don't have numbers handy, but I didn't notice any significant performance difference between headless and headed chrome. I think the main benefit of headless is ease of test server setup. We use a CI service, so that's not a factor. We are sticking with phantomjs for now because it is significantly faster than chrome for our tests.