try:
    import tkinter as tk
except ImportError:
    import Tkinter as tk
import resource

root = tk.Tk()
data = b'P6\n1024 1024\n128\n' + b'x' * 3 * 1024**2
photo = tk.PhotoImage(master=root, data=data, format='PPM')
while True:
    photo.configure(data=data)
    r = resource.getrusage(resource.RUSAGE_SELF)
    print(r.ru_maxrss)