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prealloc capacity for map and slice

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This commit is contained in:
maskpp 2024-06-13 02:04:09 +08:00
parent b6f2bbd417
commit 6c4b8eb9fd
1 changed files with 9 additions and 7 deletions
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16
triedb/pathdb/history.go
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@ -383,12 +383,13 @@ func (r *decoder) readAccount(pos int) (accountIndex, []byte, error) {
// readStorage parses the storage slots from the byte stream with specified account.
func (r *decoder) readStorage(accIndex accountIndex) ([]common.Hash, map[common.Hash][]byte, error) {
var (
last common.Hash
list []common.Hash
storage = make(map[common.Hash][]byte)
count = int(accIndex.storageSlots)
list = make([]common.Hash, 0, count)
storage = make(map[common.Hash][]byte, count)
)
for j := 0; j < int(accIndex.storageSlots); j++ {
for j := 0; j < count; j++ {
var (
last common.Hash
index slotIndex
start = (accIndex.storageOffset + uint32(j)) * uint32(slotIndexSize)
end = (accIndex.storageOffset + uint32(j+1)) * uint32(slotIndexSize)
@ -430,9 +431,10 @@ func (r *decoder) readStorage(accIndex accountIndex) ([]common.Hash, map[common.
// decode deserializes the account and storage data from the provided byte stream.
func (h *history) decode(accountData, storageData, accountIndexes, storageIndexes []byte) error {
var (
accounts = make(map[common.Address][]byte)
count = len(accountIndexes) / accountIndexSize
accounts = make(map[common.Address][]byte, count)
storages = make(map[common.Address]map[common.Hash][]byte)
accountList []common.Address
accountList = make([]common.Address, 0, count)
storageList = make(map[common.Address][]common.Hash)
r = &decoder{
@ -445,7 +447,7 @@ func (h *history) decode(accountData, storageData, accountIndexes, storageIndexe
if err := r.verify(); err != nil {
return err
}
for i := 0; i < len(accountIndexes)/accountIndexSize; i++ {
for i := 0; i < count; i++ {
// Resolve account first
accIndex, accData, err := r.readAccount(i)
if err != nil {