Just sayng, we could do at how this is done by some other editors, like Tomboy (even if it's not python), that don't have this problem, in fact there you can copy 10000 char tasks and the memory doesn't raise so fast.
Just sayng, we could do at how this is done by some other editors, like Tomboy (even if it's not python), that don't have this problem, in fact there you can copy 10000 char tasks and the memory doesn't raise so fast.