This is the 17496th most frequent Korean word.
성능이다
"성능이다" means "to have performance or functionality."
성능이다 here is used to specify the characteristic or capability of the computer, referring to its functional performance.
이 컴퓨터의 성능이다.
This is the performance of this computer.
성능이다 is used as the subject to imply something being judged, emphasized by the evaluative context.
성능이다를 평가해 보세요.
Try evaluating the performance.
성능이다 is shown in comparison context, emphasizing exceptional capabilities or efficiency of the product.