It's not ill defined to everyone else. If I say my phone is fast but it's nowhere close to the speed of a new phone, no one else would say it's fast. High perf

It's not ill defined to everyone else. If I say my phone is fast but it's nowhere close to the speed of a new phone, no one else would say it's fast. High performance means you show that its speed is competitive against the other fastest programming methods. You labeling something "high performance" because you wrote something slow and made it faster has nothing to do with releasing something and calling it "high performance" publicly.