You can expect performance dozens to hundreds of times slower than a real GPU. For example, while a dedicated card might hit 300 FPS in a demo, SwiftShader might reach 5–15 FPS on a quad-core CPU.
This article provides a comprehensive guide on what SwiftShader 2.0 does, how it works, and where you can safely download and install it. What is SwiftShader 2.0?
While SwiftShader is impressively fast for a software renderer, it is a replacement for a modern graphics card.