Function compute_hash_batch 

pub fn compute_hash_batch(keys: &[&[u8]]) -> Vec<u64>

Computes XXH3 64-bit hashes for a batch of keys in one call.

The function walks the keys slice only once, feeding each key into xxh3_64. Internally xxh3_64 already dispatches to the fastest SIMD implementation available on the host (AVX2, NEON, …), so you still get the intrinsic acceleration for each key – but with the added benefit that you can:

• call the hasher exactly once from the high-level API,
• pre-allocate the Vec<u64> only once,
• hand the resulting (hash, payload) tuples straight to batch_write_with_key_hashes, keeping the critical section (the RwLock) as small as possible.

Parameters

• keys – slice of key byte-slices; the n-th output hash corresponds to the n-th input key.

Returns

A Vec<u64> whose length equals keys.len(), containing the XXH3 hash of each key.

Examples

use simd_r_drive::storage_engine::digest::{compute_hash, compute_hash_batch};

let keys: &[&[u8]] = &[b"alice", b"bob", b"carol"];
let hashes = compute_hash_batch(keys);

assert_eq!(hashes.len(), 3);
assert_eq!(hashes[0], compute_hash(b"alice"));
assert_eq!(hashes[1], compute_hash(b"bob"));
assert_eq!(hashes[2], compute_hash(b"carol"));