Code:
ffmpeg -benchmark -i Stream2_AV1_4K_22.7mbps.webm -f null -
Video: wrapped_avframe, yuv420p, 3840x2160 [SAR 1:1 DAR 16:9], q=2-31, 200 kb/s, 25 fps, 25 tbn, 25 tbc (default)
frame= 3604 fps= 16 q=-0.0 Lsize=N/A time=00:02:24.16 bitrate=N/A speed=0.622x
bench: utime=1069.000s stime=12.891s rtime=231.970s
bench: maxrss=856880kB
Since the video was 25 fps, in benchmark give that my PC is only capable to decode at 15-16 fps (speed=0.622x) at with this 22.7mbps video.
CPU: Intel Core i7-8550U
Decoder: ffmpeg-20181007-0a41a8b-win64 - libaom-av1 1.0.0-691-gbb8157b89