# Fastest way of running sage?

Hi,

So far I have used 3 different "versions" of sage:

the online sage notebook: http://www.sagenb.org/

the sage notebook that I downloaded and run on Windows 7 thru VirtualBox on an intel core 2duo

the sage in the cloud found here: https://cloud.sagemath.com/

Using "time a = factorial(1000000)" I get cpu and wall times of(.41s, .41s) for 1 and 2,13s; 9.53s) for 2. For 3 "time" apparently does not work but it seems slower than 1.

Questions: Why is 1 significantly faster than 2?

How can I test 3?

Is there a way to test entire programs that gives the time for every step.

What is the fastest way to run sage?

Thanks!