Method and system for detection and notification of performance changes in program code. In one aspect, stored previous routine test results and current routine test results are accessed, indicating a previous and current time of execution of the program code, the current routine test performed later than the previous routine test. The previous and current times of execution are automatically compared and a change in performance of the program code is determined. Users are notified of the change in performance, where each user is notified after the change in performance is determined to be significant enough to the particular user according to associated predetermined criteria.