Optimizing GIF performance on web and mobile: SDK or API?

Hello everyone,
I am integrating GIFs into websites and Steal Brainrot Game mobile apps, and I see two ways: using SDK or calling API directly. I want to ask:

In practice, should I use SDK or API to optimize GIF loading speed and quality?

Has anyone encountered problems with delay or GIF display when using API?

For projects with many concurrent users, which implementation is more stable?

Looking forward to receiving experiences and suggestions from the community. Thank you everyone!