Wow, a big difference in speed in the new beta. $bvar(&var,offset,length) is now about 25x faster in bvar_bench2a than it used to be for the max string length for the list of integers, and it has the expected behavior of becoming slower if you chop it up into many short strings, so the 'sweet spot' for the fastest speed is now fewer $maxlenl length strings instead of many strings having only 100 integers in them.

It's now faster than the bvar_bench3a method that did bcopy-then-mime-then-bvar(&var,1-).text it, as it should be, though that alternative is also now faster, taking only around 2/3rds of the time that it used to take.