The quest for enhanced realism and deeper player immersion is constantly constrained by performance. Fast and accurate simulation is a cornerstone of next-generation games, and for several years, we’ve been pushing the limits of the Unreal Engine physics engine, Chaos.
Watch this session recorded at Unreal Fest Chicago 2026 to uncover a long-term optimization journey that has delivered up to 40% performance gains in targeted scenarios—without sacrificing stability, backward compatibility, or memory footprint.
This has not been the result of a single fix or isolated optimization, but of a sustained, methodical effort driven by deep profiling, scalable algorithm design, aggressive use of multithreading, and meticulous low-level code optimization.
In this presentation, Epic Games Physics Programmer Vincent Robert does a deep dive into the key algorithms, architectural trade-offs, and lessons he learned from optimizing Chaos, as he sought to enable complex simulation workloads to better exploit modern hardware even when faced with traditional sequential constraints.
While the context is physics simulation, the core theme is performance optimization. You’ll come away with practical, reusable techniques and mental models that can be applied across a wide range of systems to unlock additional performance.
Find out more about using Unreal Engine to develop games here: unrealengine.com/uses/games
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