From aa4e31369017c6093b171f4302c6908751b43575 Mon Sep 17 00:00:00 2001 From: Anjan Roy Date: Sat, 10 Dec 2022 11:48:19 +0400 Subject: [PATCH] chg: first convert all elements to little endian bytes and then consume them in a single call to blake3 hasher Signed-off-by: Anjan Roy --- src/hash/blake/mod.rs | 11 ++++++++--- 1 file changed, 8 insertions(+), 3 deletions(-) diff --git a/src/hash/blake/mod.rs b/src/hash/blake/mod.rs index b596ab9..e20391b 100644 --- a/src/hash/blake/mod.rs +++ b/src/hash/blake/mod.rs @@ -276,10 +276,15 @@ where let digest = if Felt::IS_CANONICAL { blake3::hash(E::elements_as_bytes(elements)) } else { - let mut hasher = blake3::Hasher::new(); - for element in E::as_base_elements(elements) { - hasher.update(&element.as_int().to_le_bytes()); + let blen = elements.len() << 3; + let mut bytes = vec![0u8; blen]; + + for (idx, element) in E::as_base_elements(elements).iter().enumerate() { + bytes[idx * 8..(idx + 1) * 8].copy_from_slice(&element.as_int().to_le_bytes()); } + + let mut hasher = blake3::Hasher::new(); + hasher.update(&bytes); hasher.finalize() }; *shrink_bytes(&digest.into())