cmd/evm/internal/t8ntool, core: prealloc map sizes where possible (#2…

…9620) set cap for map in a certain scenario
ethereum · Apr 30, 2024 · fecc8a0 · fecc8a0
1 parent 8c3fc56
commit fecc8a0
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Showing 2 changed files with 2 additions and 2 deletions.
diff --git a/cmd/evm/internal/t8ntool/transition.go b/cmd/evm/internal/t8ntool/transition.go
@@ -296,7 +296,7 @@ func (g Alloc) OnAccount(addr *common.Address, dumpAccount state.DumpAccount) {
 	balance, _ := new(big.Int).SetString(dumpAccount.Balance, 0)
 	var storage map[common.Hash]common.Hash
 	if dumpAccount.Storage != nil {
-		storage = make(map[common.Hash]common.Hash)
+		storage = make(map[common.Hash]common.Hash, len(dumpAccount.Storage))
 		for k, v := range dumpAccount.Storage {
 			storage[k] = common.HexToHash(v)
 		}

diff --git a/core/blockchain.go b/core/blockchain.go
@@ -1309,7 +1309,7 @@ func (bc *BlockChain) InsertReceiptChain(blockChain types.Blocks, receiptChain [
 		// Delete block data from the main database.
 		var (
 			batch       = bc.db.NewBatch()
-			canonHashes = make(map[common.Hash]struct{})
+			canonHashes = make(map[common.Hash]struct{}, len(blockChain))
 		)
 		for _, block := range blockChain {
 			canonHashes[block.Hash()] = struct{}{}