Why does Matlab run faster after a script is “warmed up”?

Question

I have noticed that the first time I run a script, it takes considerably more time than the second and third time¹. The \"warm-up\" is mentioned in this question

Answer 1

Matlab is interpreted. If you don't warm up the code, you will be losing a lot of time due to interpretation instead of the actual algorithm. This can skew results of timings significantly.

Running the code at least once will enable Matlab to actually compile appropriate code segments.