In short, it seems to take almost half second to copy a 1-tuple string (view) bat.

Inspected with gdb, I see that the copy falls in "(3) we can copy the heaps (memcopy, or even VM page sharing)", with the following values:

cnt = 1

bunstocopy = BUN_NONE

isVIEW(b) = TRUE

VIEWtparent(b) = 0

The actual tail and heap copy then takes place:

heapcopy(bn, "tail", &bthp, &b->theap)

heapcopy(bn, "theap", &thp, b->tvheap)

Does this mean that a heap of almost 1GB has been copied for a 1-tuple view?

Roberto