Kokeilin pientä python-ohjelmaa, jossa voi vieritellä taulukon rivejä ja sarakkeita. Ohjelma näyttää toimivan, mutta sen käynnistyminen kestää omituisen kauan. Ohjelma on tällainen
import tkinter as tk
LABEL_BG = "#ccc"  # Light gray.
ROWS, COLS = 100, 11  # Size of grid.
ROWS_DISP = 6  # Number of rows to display.
COLS_DISP = 8  # Number of columns to display.
class MyApp(tk.Tk):
    def __init__(self, title="Sample App", *args, **kwargs):
        tk.Tk.__init__(self, *args, **kwargs)
        self.title(title)
        self.configure(background="Gray")
        self.columnconfigure(0, weight=1)
        self.rowconfigure(0, weight=1)
        master_frame = tk.Frame(self, bg="Light Blue", bd=3, relief=tk.RIDGE)
        master_frame.grid(sticky=tk.NSEW)
        master_frame.columnconfigure(0, weight=1)
        label1 = tk.Label(master_frame, text="Frame1 Contents", bg=LABEL_BG)
        label1.grid(row=0, column=0, pady=5, sticky=tk.NW)
        frame1 = tk.Frame(master_frame, bg="Green", bd=2, relief=tk.GROOVE)
        frame1.grid(row=1, column=0, sticky=tk.NW)
        cb_var1 = tk.IntVar()
        checkbutton1 = tk.Checkbutton(frame1, text="StartCheckBox", variable=cb_var1)
        checkbutton1.grid(row=0, column=0, padx=2)
        label2 = tk.Label(master_frame, text="Frame2 Contents", bg=LABEL_BG)
        label2.grid(row=2, column=0, pady=5, sticky=tk.NW)
        # Create a frame for the canvas and scrollbar(s).
        frame2 = tk.Frame(master_frame)
        frame2.grid(row=3, column=0, sticky=tk.NW)
        # Add a canvas in that frame.
        canvas = tk.Canvas(frame2, bg="Yellow")
        canvas.grid(row=0, column=0)
        # Create a vertical scrollbar linked to the canvas.
        vsbar = tk.Scrollbar(frame2, orient=tk.VERTICAL, command=canvas.yview)
        vsbar.grid(row=0, column=1, sticky=tk.NS)
        canvas.configure(yscrollcommand=vsbar.set)
        # Create a horizontal scrollbar linked to the canvas.
        hsbar = tk.Scrollbar(frame2, orient=tk.HORIZONTAL, command=canvas.xview)
        hsbar.grid(row=1, column=0, sticky=tk.EW)
        canvas.configure(xscrollcommand=hsbar.set)
        # Create a frame on the canvas to contain the buttons.
        buttons_frame = tk.Frame(canvas, bg="Red", bd=2)
        # Add the buttons to the frame.
        for i in range(1, ROWS+1):
            for j in range(1, COLS+1):
                button = tk.Button(buttons_frame, padx=7, pady=7, relief=tk.RIDGE,
                                   text="[%d, %d]" % (i, j))
                button.grid(row=i, column=j, sticky='news')
        # Create canvas window to hold the buttons_frame.
        canvas.create_window((0,0), window=buttons_frame, anchor=tk.NW)
        buttons_frame.update_idletasks()  # Needed to make bbox info available.
        bbox = canvas.bbox(tk.ALL)  # Get bounding box of canvas with Buttons.
        #print('canvas.bbox(tk.ALL): {}'.format(bbox))
        # Define the scrollable region as entire canvas with only the desired
        # number of rows and columns displayed.
        w, h = bbox[2]-bbox[1], bbox[3]-bbox[1]
        dw, dh = int((w/COLS) * COLS_DISP), int((h/ROWS) * ROWS_DISP)
        canvas.configure(scrollregion=bbox, width=dw, height=dh)
        label3 = tk.Label(master_frame, text="Frame3 Contents", bg=LABEL_BG)
        label3.grid(row=4, column=0, pady=5, sticky=tk.NW)
        frame3 = tk.Frame(master_frame, bg="Blue", bd=2, relief=tk.GROOVE)
        frame3.grid(row=5, column=0, sticky=tk.NW)
        cb_var2 = tk.IntVar()
        checkbutton2 = tk.Checkbutton(frame3, text="EndCheckBox", variable=cb_var2)
        checkbutton2.grid(row=0, column=0, padx=2)
if __name__ == "__main__":
    app = MyApp("Scrollable Canvas")
    app.mainloop()
Koneeni on aika vanha pentium-laite, mutta muistia on 8 Gt.
Jos ohjelmaa kokeilee windows-koneessa, mitään poikkeavaa ei havaitse.
Olisiko asialle joku selitys ja voisiko käynnistymisen saada normaalinopeuksiseksi jotain säätämällä. 
Muok.
System monitori ei näytä koko odostusajan kestävää poikkeuksellisen isoa kuormaa, vain lyhyt melkein 100% :iin menevä kohouma näkyy ja kummatkin suorittimet nousevat suunnilleen saman käyrän mukaan.