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solana-with-rpc-optimizations
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Gives back 8 bytes to stack buffer for account data when hashing (#35374)

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Brooks 2024-03-01 14:27:48 -05:00 committed by GitHub
parent 3ec020f742
commit 59ed049dc5
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GPG Key ID: B5690EEEBB952194
1 changed files with 6 additions and 8 deletions
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14
accounts-db/src/accounts_db.rs
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@ -6120,18 +6120,16 @@ impl AccountsDb {
let mut hasher = blake3::Hasher::new();
// allocate 128 bytes buffer on the stack
const BUF_SIZE: usize = 128;
const TOTAL_FIELD_SIZE: usize = 8 /* lamports */ + 8 /* slot */ + 8 /* rent_epoch */ + 1 /* exec_flag */ + 32 /* owner_key */ + 32 /* pubkey */;
const DATA_SIZE_CAN_FIT: usize = BUF_SIZE - TOTAL_FIELD_SIZE;
const BUFFER_SIZE: usize = 128;
const METADATA_SIZE: usize = 8 /* lamports */ + 8 /* rent_epoch */ + 1 /* executable */ + 32 /* owner */ + 32 /* pubkey */;
const REMAINING_SIZE: usize = BUFFER_SIZE - METADATA_SIZE;
let mut buffer = SmallVec::<[u8; BUFFER_SIZE]>::new();
let mut buffer = SmallVec::<[u8; BUF_SIZE]>::new();
// collect lamports, slot, rent_epoch into buffer to hash
// collect lamports, rent_epoch into buffer to hash
buffer.extend_from_slice(&lamports.to_le_bytes());
buffer.extend_from_slice(&rent_epoch.to_le_bytes());
if data.len() > DATA_SIZE_CAN_FIT {
if data.len() > REMAINING_SIZE {
// For larger accounts whose data can't fit into the buffer, update the hash now.
hasher.update(&buffer);
buffer.clear();