Constant VERIFIER_BUFFER_BOUND

const VERIFIER_BUFFER_BOUND: usize = 5;

The bound for the chain verifier and transaction verifier buffers.

We choose the verifier buffer bound based on the maximum number of concurrent verifier users, to avoid contention:

• the ChainSync block download and verify stream
• the Inbound block download and verify stream
• the Mempool transaction download and verify stream
• a block miner component, which we might add in future, and
• 1 extra slot to avoid contention.

We deliberately add extra slots, because they only cost a small amount of memory, but missing slots can significantly slow down Zebra.