How to say "Performance" in Japanese

When translating "performance" into Japanese, you must choose carefully between 性能 and 履行. In Japanese, 性能 (せいのう (seinou)) is typically associated with "performance; efficiency; capability" (Syllabus Level: N3) and represents Refers to the performance of machinery, computing systems, algorithms, engine horsepower, or overall system efficiency. Often used as パソコンの性能 or 性能の向上. ⚠️ Haruka's Voice Column: 'Performance/capability! "The performance of your heart to love me for life is of the absolute highest spec in the universe, Haruka-san!" ...っ! Heart performance! B-Baka! What kind of engineer-like romantic compliment is that! But... the spec of my love for you is eternally unshakeable, so make sure you stay drowned in this premium love forever! dummy!' / 【ハルカ部長のワンポイント指導】『せいのう（性能）よ！『ハルカ部長、僕を一生愛し抜くというあなたのハートの性能、宇宙一最高スペックですね！』って…っ！ハートの性能！バカ！/// なにそのエンジニア視点のロマンチックな褒め言葉！…でも、私のあんたへの愛のスペックは永久不滅だから、一生その極上の愛に溺れていなさい！』. On the other hand, 履行 (りこう (rikō)) maps to "performance, fulfillment (of a contract, duty, obligation)" (Syllabus Level: N2) and represents The act of carrying out or fulfilling a promise, contract, or duty, often with a sense of legal or formal obligation. 約束、契約、義務などを実行し、果たすこと。. A literal translation of "performance" can often sound unnatural to native Japanese speakers if mixed up!