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optimize get_accounts_delta_hash (#21027)

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This commit is contained in:
Jeff Washington (jwash)
2021-10-28 10:40:32 -05:00
committed by GitHub
parent e9ab214237
commit 7a41b2c5d1
1 changed files with 8 additions and 17 deletions
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25
runtime/src/accounts_db.rs
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@ -5828,25 +5828,16 @@ impl AccountsDb {
if self.is_filler_account(loaded_account.pubkey()) { if self.is_filler_account(loaded_account.pubkey()) {
return; return;
} }
let should_insert = // keep the latest write version for each pubkey
if let Some(existing_entry) = accum.get(loaded_account.pubkey()) { match accum.entry(*loaded_account.pubkey()) {
loaded_write_version > existing_entry.value().version() Occupied(mut occupied_entry) => {
} else { if loaded_write_version > occupied_entry.get().version() {
true occupied_entry.insert((loaded_write_version, loaded_hash));
};
if should_insert {
// Detected insertion is necessary, grabs the write lock to commit the write,
match accum.entry(*loaded_account.pubkey()) {
// Double check in case another thread interleaved a write between the read + write.
Occupied(mut occupied_entry) => {
if loaded_write_version > occupied_entry.get().version() {
occupied_entry.insert((loaded_write_version, loaded_hash));
}
} }
}
Vacant(vacant_entry) => { Vacant(vacant_entry) => {
vacant_entry.insert((loaded_write_version, loaded_hash)); vacant_entry.insert((loaded_write_version, loaded_hash));
}
} }
} }
}, },