core/types: prealloc map in HashDifference as in TxDifference (#32946)

cuiweixie · web-flow · commit 69df6bb8d590 · 2025-10-20T10:35:14.000+08:00
diff --git a/core/types/transaction.go b/core/types/transaction.go
@@ -648,7 +648,7 @@ func TxDifference(a, b Transactions) Transactions {
 func HashDifference(a, b []common.Hash) []common.Hash {
 	keep := make([]common.Hash, 0, len(a))
 
-	remove := make(map[common.Hash]struct{})
+	remove := make(map[common.Hash]struct{}, len(b))
 	for _, hash := range b {
 		remove[hash] = struct{}{}
 	}

Original file line number	Diff line number	Diff line change
`@@ -648,7 +648,7 @@ func TxDifference(a, b Transactions) Transactions {`
`648`	`648`	`func HashDifference(a, b []common.Hash) []common.Hash {`
`649`	`649`	`keep := make([]common.Hash, 0, len(a))`
`650`	`650`
`651`		`- remove := make(map[common.Hash]struct{})`
	`651`	`+ remove := make(map[common.Hash]struct{}, len(b))`
`652`	`652`	`for _, hash := range b {`
`653`	`653`	`remove[hash] = struct{}{}`
`654`	`654`	`}`