While the logo itself doesn't significantly impact FPS, its removal is often a hallmark of "optimized" or "cracked" builds that users believe run better. How to Achieve "No Logo" Performance
Instead of a bitmap logo, Swift Shader 30 outputs a single line to debug console: [Swift Shader 30] running – no logo, just speed.
Several community archives host versions of SwiftShader that have the watermark pre-removed.