Learn in the textbookPerformance Evaluation
DefinitionResponse time written as 応答時間 is the kanji-based Japanese name for response time and refers to exactly the same interval.
ExplanationDocuments differ only in whether they use the katakana word or the kanji word, and neither the interval measured nor which way counts as better (shorter is better) changes. Whichever name appears, read it as the same metric.
Memory hookIn 応答時間, 応答 is the word used to render the English "response," so it means the same as the katakana レスポンス.