Tips for Analyzing Multiple-run Performance Data

Related Topics

 

§          See the impact of code modifications by comparing two runs. Quantify highlights performance improvements (green) and regressions (red) in the Call Graph window, and displays the differences between the runs in the Function List and Function Detail windows.

§          You can merge multiple runs to help tune code that is shared by two or more programs, or to tune code over a variety of different inputs.

§          If you have automated your tests, incorporate Quantify into your test scripts and merge the test results from the command line. Compare results from day to day. This will help you detect performance bottlenecks as soon as they emerge. An unexpected improvement in performance may indicate that you are no longer testing some routines in the code, or that the program under test is not operating as expected.

(C) Copyright IBM Corporation 1993, 2009.