VL.Audio FFT is lagging?

vvvv gamma question
1

maybe a question maybe a bug,
in the most recent version of VL.Audio I noticed that giving a wider - bigger window (>= 1024) FFT points, it gets laggy and blocks my patch.
Can anyone verify this ?

2

can you share a patch and name two vvvversions that would allow us to reproduce this change in behavior?