I can't believe my eyes, but apparently this is not a typo ... https://code.videolan.org/videolan/dav1d/-/releases#0.5.1 dav1d 0.5.1 'Asiatic Cheetah', the fast and small AV1 decoder This is a minor update of the 0.5.0 version of dav1d, the fast and small AV1 decoder, codename 'Asiatic Cheetah'. 0.5.1 brings improvements in speed for SSE2 CPUs (up to 50% speedup), and ARMv7 CPUs (up to 41% speedup). It also fixes minor issues and minor speed improvements for other architectures. Changes for 0.5.1 'Asiatic Cheetah': ------------------------------------ 0.5.1 is a small release improving speeds and fixing minor issues compared to 0.5.0: - SSE2 optimizations for CDEF, wiener and warp_affine - NEON optimizations for SGR on ARM32 - Fix mismatch issue in x86 asm in inverse identity transforms - Fix build issue in ARM64 assembly if debug info was enabled - Add a workaround for Xcode 11 -fstack-check bug Found via Phoronix. Compiled and installed .. apparently no .so bump this time, so no recompile needed :P