Docker-jitsi-meet uses JVB 2 ? Any upper limit on total jitsters in a conference?

Hi does the official docker-jitsi-meet/ docker-jitsi-meet use JVB 2 ?

I hear JVB 2 can support hundreds of users in a single conference? Is there any upper limit (or a config) for this?

It seems it does use JVB2 by looking at the dockerfile inside the jvb folder.
WIll be doing some benchmarking and if I come up with some values will share it here