How to speed up python's 'turtle' function and stop it freezing at the end

Question

I have written a turtle program in python, but there are two problems.

1. It goes way too slow for larger numbers, I was wonder how I can speed up turtle.

Answer 1

Python turtle goes very slowly because screen refreshes are performed after every modification is made to a turtle.

You can disable screen refreshing until all the work is done, then paint the screen, it will eliminate the millisecond delays as the screen furiously tries to update the screen from every turtle change.

For example:

import turtle
import random
import time
screen = turtle.Screen()

turtlepower = []

turtle.tracer(0, 0)
for i in range(1000):
    t = turtle.Turtle()
    t.goto(random.random()*500, random.random()*1000)
    turtlepower.append(t)

for i in range(1000):
    turtle.stamp()

turtle.update()

time.sleep(3)

This code makes a thousand turtles at random locations, and displays the picture in about 200 milliseconds.

Had you not disabled screen refreshing with turtle.tracer(0, 0) command, it would have taken several minutes as it tries to refresh the screen 3000 times.

https://docs.python.org/2/library/turtle.html#turtle.delay