Bisection (software engineering)
Bisection is a method used in software development to identify change sets that result in a specific behavior change. It is mostly employed for finding the patch that introduced a bug. Another application area is finding the patch that indirectly fixed a bug.
Phoronix Test Suite can do bisection to automatically find performance regressions.
Code bisection has the goal of minimizing the effort to find a specific change set.
The bisection method
Code bisection algorithm
- splits up the search space of candidate revisions
- tests for the behavior in question
- reduces the search space depending on the test result
- re-iterates the steps above until at most one patch candidate remains
Desirable repository properties
For code bisection it is desirable that each revision in the search space can be compiled and tested independently.