It depends. Pressure cooking brown rice will take longer than pressure cooking potatoes. But will still be much quicker than cooking brown rice in a typical pot. I’ll try to keep a list of how long different things take to cook when I pressure cook them and add it in a new post. Here’s a decent link to check out in the meantime. https://www.dummies.com/article/home-auto-hobbies/food-drink/recipes/pressure-cookers/how-long-to-cook-foods-in-a-pressure-cooker-201427/