Memory fragmentation was the Achilles' heel of software rendering. The new Sub-Allocator pre-caches command buffers and descriptor pools, eliminating the vkErrorOutOfHostMemory crashes common in long simulation runs.
The original Swift Shader 3.0 was commercial software. The “sem a logo” version is an unauthorized crack. You would typically download a single file: d3d9.dll.
Some older game cracks included a patched SwiftShader without logo. These are not recommended due to malware risks.