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[Zoe Brooks]

Great topic. The core issue with shader compilation stutter comes down to CPU serialization during the render loop: when the engine hits a new shader variant or pipeline combination it hasn’t compiled yet, the main thread blocks on the compiler while the GPU sits idle, and that frame-time spike is what you feel as a hitch. Back in the DX11/GL days this happened on the fly through the driver’s shader compiler, which is why older titles stuttered unpredictably depending on your exact hardware and settings.

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