Steve.
some of my bb stats....useing my old i5.
1. 100 bars bb mix to stereo wav...40 secs.
2. boot into bb from win desktop..4 secs at most.
3. regen a trak ...same as 2 , 4 secs at most.
4. cliking >+ regen button or double clicking on a bar ,
same deal mate 4 secs or less.

ps i reckon what happens with regens is the low level bb code is prolly filling a few buffers then starts playing ..ie advanced look ahead buffer mgt // programming.
thus creating illusion of speed , similar to what mainstream daw multitraks do....fill buffers etc.

happiness/cheers.
om


New Song "PRETTY GIRL" for my wife...Dec 2023
(my vocs....mixed for good earbuds.)
https://soundcloud.com/alfsongs/prettygirlrbfinalcalfsongsdec2023mp3
(and rock song THE STALLION and bluegrass song... BANKER MAN....90 songs useing bb/rb.)