If you've done any aviation training you'll have done exams in the subject of "performance". I understand this to mean they require this information.

Is that the exact wording?

I suppose the exams related to the subject Flight Performance & Planning.

Do you have a pass in Perf A or Perf C perhaps?

HWB

It dates back to pre JAR when they had several different performance exams in the UK.

JAR now covers you for the whole lot with the one exam.

Just stick down JAR ATPL Performance exam