Python tkinter treeview insert from a list

Question

Do you know if there is another way than using a 'for' loop to feed the tkinter treeview widget from a list, because the loading time is relatively long with this instruction?

Thanks for your answers!

my_list = []
for i in range(1, 1_000_001):
    my_list.append(i)

root = tk.Tk()
root.geometry('800x600')

my_treeview = ttk.Treeview(root)

my_treeview['columns'] = 'Données'
for column in my_treeview['columns']:
    my_treeview.heading(column, text=column)

for item in my_list:
    my_treeview.insert('', 'end', values=item)

my_treeview.pack()

root.mainloop()

Loading time: about 5 seconds