Minor improvement, release frame of finished generator objects immediately.
Minor improvement, release frame of finished generator objects immediately.

wfxiang08/Nuitka,kayhayen/Nuitka,wfxiang08/Nuitka,wfxiang08/Nuitka,tempbottle/Nuitka,kayhayen/Nuitka,tempbottle/Nuitka,kayhayen/Nuitka,tempbottle/Nuitka,tempbottle/Nuitka,kayhayen/Nuitka,wfxiang08/Nuitka