1The performance or capability of a machine, device, or system — how well it functions, e.g. its speed, power, or precision.
新しいスマートフォンは前のモデルより性能が良い。
The new smartphone has better performance than the previous model.
この車はエンジンの性能が高く、燃費もいい。
This car has a high-performance engine and good fuel efficiency.
パソコンの性能を比較してから購入を決めた。
I compared the performance of the computers before deciding which to buy.
カメラの性能が上がったおかげで、暗い場所でもきれいに撮れる。
Thanks to the improved camera performance, I can take clear photos even in dark places.