5 ms·

Here's one article that claims the time difference between covered and uncovered isn't significant: https://www.americastestkitchen.com/how_tos/6646-covered-vs-

• stevekemp 10mo ago
  I learned this lesson when camping on an alcohol stove, a covered pot will boil a lot faster in the wild than an open one. I suspect if you're turning things on "high" on an average kitchen stove-top it won't have such a stark difference, but it should still be measurable.