I started reading about game development design patterns and from my experience there are 2 options for update methods. The first one receive from the game loop and delta time of this update and multiple everything by it, for example position += speed * delta_time. And this will happen in the game loop without delay.
The second option is too set constant frame delay and use it. In the end of the loop function you use sleep(last_frame_time + frame_length - current_time).
Does it matter what do I use? What's more common? I know unity use the delta time technique but it's the only one I saw that use it. I would like to hear your opinions on what to use for both options.
Should I always use the first option? always the second?
Thank you for your time.
