pub(crate) const MAX_PENDING_UNITS: usize = 8192;Expand description
Hard cap on queued units, independent of the byte budget.
A Pending is on the order of 64 bytes, so this is roughly the same
order of bookkeeping as the default 1 MiB byte budget, and it is far
more objects than any realistic hold window. It exists because
Item::Elided units carry zero bytes: without it, eliding every
object behind a never-released Hold grows the deque without bound
while queued_bytes() stays at zero.