Khamit Ardashev wrote:

date/tz.cpp:755: performance: Variable 'u' is assigned in constructor body. Consider performing initialization in initialization list. date/date.h:7218: performance: Function parameter 'format' should be passed by reference. date/tz.cpp:220: performance: Function parameter 'path' should be passed by reference. date/tz.cpp:2417: performance: Function parameter 'format' should be passed by reference.

This email appears to have been sent to the wrong mailing list, as the tz project doesn't have any files named tz.cpp or date.h.