If I am learning something brand new I prefer to be sober. But if I'm doing something I know or iterating on previous concepts I like to be high. I am definitely slower while high, however. And after a couple bowls over the day my brain gets too fogged to do anything complex. I've got RSI and that makes things slow anyway but when I'm high I'm less frustrated by it. Especially when WSR doesn't recognize what I say 5+ times in a row.