qstring-insensitive-allocation

Finds unneeded memory allocations such as if (str.toLower().contains("foo")) which you should fix as if (str.contains("foo", Qt::CaseInsensitive)) to avoid the heap allocation caused by toLower().

Matches any of the following cases: str.{toLower, toUpper}().{contains, compare, startsWith, endsWith}()

Pitfalls

Qt::CaseInsensitive is different from QString::toLower() comparison for a few code points, but it should be very rare: http://lists.qt-project.org/pipermail/development/2016-February/024776.html