I'm looking for an adjective/noun for a thing (e.g computer) that is small/not fully functional compared with other, similar such things, but whose performance is extremely advanced.
My English may not be good enough to express my idea, but I find @sameyeam's is the best fit for my unclear question.
"Pared down and streamlined, the thing's great performance has been unleashed by shedding features you don't need."
Streamlined emphasizes efficiency and ease of use more than specific but powerful functionality.
I'm still looking for an noun to describe it. Peppy may be a fit, but I need more suggestions.