musescore/MuseScore — pull request #284 by heuchi (2013-03-26 16:32:59+00:00)
Title: better performance of clef handling

It is not necessary to call updateNoteLines() after adding or removing a generated clef, since (just as generated key signatures) these are only repeated and don't mean any (real) change.

On my machine this speeds up tst_concertpitchbenchmark by about 60%.