性能|せいのうseinou[0]heiban (flat)

1. nounability; performance; efficiency
   この車くるまはあの車くるまより性能せいのうがよい。↗

   This car has a better performance than that one.

• SynonymパフォーマンスNeutralA loanword from English 'performance', neutral in register. It typically stresses performance actually demonstrated or measured—of athletes, companies, or computers—or a stage act, while 性能 points to built-in capability.

Choose 性能 for what a machine, device, or system can do—its built-in capability or efficiency; choose パフォーマンス for performance actually shown or measured, such as results in sports, business, or computing, or a stage act.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

1. 機械きかいや道具どうぐの性質せいしつと能力のうりょく。