Shader Optimization – True Instruction Cost, Performance Tips // Tutorial

Streaming every Thursday at Find more tutorials at Learn how to optimize material performance in HLSL and Unreal Engine. I use shader compiler to analyze GPU assembly instructions (which is easier than you think!). I explain the real speed of intrinsic math operations - how expensive is sin, cos, atan in GPU cycles. I also share tips about texture sampling cost, UVs. The process applies to all real time game engines that use HLSL language: Unity, Unreal Engine, Godot Kostas Anagnostou - How to read shader assembly: Fabian Giesen (Ryg) - A Trip Through Graphics Pipeline: 00:00 Intro 00:05 Shader assembly. How compilers work 00:08 Basic shader in HLSL 10:00 Cost of sin instruction (sine, cosine) 12:20 Test material in UE5. Are constants optimized? 15:46 Unreal instruction count is fake 20: