I never realized how much stupidity in this thread.
Half the settings for VP9 encoding are placebo and just waste time.
This is all what you need
>single pass
ffmpeg -i "INPUT" -threads 4 -c:v libvpx-vp9 -profile:v 0 -pix_fmt yuv420p -b:v 0 -crf 30 -g 300 -cpu-used 1 -lag-in-frames 25 -aq-mode 2 -tile-columns 1 -row-mt 1 -enable-tpl 1 "OUTPUT"
You can test the original file from here
https://file-examples.com/index.php/sample-video-files/sample-mp4-files/
This took ~ 75 seconds to encode a 30 seconds of 1080p video on my shitty 6th gen i5
with 90% reduction in file size.
What do you want more than that?