High performer is so subjective too.
You can be a great unblocker, team lead, and work well within cross cutting areas and with interdepartmental stake holders, have a history of strong technical performance.
and yet its nebulous if that means you're a high performer or not to those hiring. It seems I'm seeing 'culture fit' as a common reason people aren't getting hired again. That was out of vogue for a good while.
In tech 'culture fit' is generally a dog whistle for ageism in my experience.