pub const BATCH_MAX: usize = 64;Expand description
Commands taken out of the intake lanes in one turn.
04 section 3 fixes this at 64 and gives the reason: the prefetch distance
is the whole batch, and Y1 removes what usually keeps that window short,
which is a lock held across it and other threads able to invalidate a line
inside it. Valkey ships 16 and Redis 8.4 ships 16 because they have both.