Ray introduces the ray.remote decorator which turns a python function into a "remote function". Remote functions are "futures", a remote function f can runned with f.remote(). This will trigger the execution of the function but not block the runtime of the program (as an async function).

In 01_parallel_calls.py one can see the execution of a remote function, where each call needs 2 seconds. The remote function runned 10 times takes approximately 2 seconds, whereas the serial takes around 20.

python 01_parallel_calls.py 

2024-11-29 16:08:09,296	INFO worker.py:1819 -- Started a local Ray instance.

Successfully imported ray!

sum_serial(n)=10
time sum_serial=20.037309885025024

sum_remote(n)=10
time sum_remote=2.1553449630737305