Optimizing Metal Pipeline for Smooth 120 FPS in GPUI

Learn how Zed optimized its metal pipeline to maintain a smooth 120 FPS in GPUI by addressing issues with direct vs. composited mode rendering, frame synchronization, instance buffers, ProMotion, and CADisplayLink.

Published 9 months ago by @nathansobo on zed.dev

Abstract

Zed optimized its metal pipeline for smooth 120 FPS in GPUI by fixing issues related to direct vs. composited mode rendering, frame synchronization, instance buffers, ProMotion, and CADisplayLink. They addressed problems with frame rate caps, jittery scrolling, and frozen UI by tweaking synchronization methods and utilizing Core Video API, leading to stable and smooth scrolling at a consistent 120 FPS.

Results

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Discussion

How this relates to indie hacking and solopreneurship.

Relevance

This article is crucial for you as it dives deep into optimizing the Metal pipeline for consistent 120 FPS performance. It highlights challenges around rendering modes, synchronization, and display refresh rates, offering valuable insights into addressing frame rate issues and ensuring a smooth user experience.

Applicability

To ensure smooth 120 FPS performance in your projects, you should carefully consider rendering modes (direct vs. composited), implement proper frame synchronization techniques, manage instance buffers efficiently, leverage ProMotion for responsive displays, and optimize the use of CADisplayLink for consistent frame rendering.

Risks

One potential risk to be aware of is the complexity of optimizing frame synchronization and rendering processes, which may require thorough testing and iteration. Additionally, making changes to critical rendering code can lead to unexpected issues, as seen in the article when switching between synchronization methods.

Conclusion

By understanding the nuances of rendering modes, synchronization mechanisms, and display refresh rates discussed in the article, you can stay ahead of the curve in optimizing graphics performance for future projects. Being able to achieve and maintain 120 FPS seamlessly can enhance user experience and set your projects apart in terms of performance.

References

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Optimizing the Metal pipeline to maintain 120 FPS in GPUI
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