As seen on reddit, the Alliance for Open Media - AOM has released SVT-AV1 v. 2.3.0
The Scalable Video Technology for AV1 (SVT-AV1 Encoder) is an AV1-compliant software encoder library.
NEW FAST DECODE MODE
New fast-decode (2) to allow for an average AV1 software cycle reduction of 25-50% vs fast-decode 0 with a 1-3% BD-Rate loss across the presets
Improved fast-decode (1) option to increase its AV1 software cycle reduction by ~10% while maintaining the same quality levels
Improved --lp settings for high resolutions, with CRF gaining a ~4% improvement in speed and VBR gaining ~15%
Further Arm-based optimizations improving the efficiency of previously written Arm-neon implementations by an average of 30%
Address speed regressions for high resolutions first pass encode by tuning the threading parameters, with 1080p showing the biggest gains
Enabled AVX512 by default in cmake allowing for ~2-4% speedup