[F3nd0]

The specification for AV2 has only been finalised very recently, so performant encoders have not yet been developed. Meaningful comparison to older codecs like H265 and AV1 will only be possible once that has changed. (It'll be slower, but almost certainly not one-frame-per-second slow.)

[Dylan16807]

Getting the full bitrate gains will be slower.

For any specific bitrate and quality target, there's a good chance it'll be faster.