core/rawdb,eth/protocols,p2p: prealloc slice size (#29893)

chore: prealloc slice size

Author: tianyeyouyou

eth/protocols/snap/sync.go

@@ -3250,9 +3250,9 @@ func (t *healRequestSort) Merge() []TrieNodePathSet {
 // sortByAccountPath takes hashes and paths, and sorts them. After that, it generates
 // the TrieNodePaths and merges paths which belongs to the same account path.
 func sortByAccountPath(paths []string, hashes []common.Hash) ([]string, []common.Hash, []trie.SyncPath, []TrieNodePathSet) {
-	var syncPaths []trie.SyncPath
-	for _, path := range paths {
-		syncPaths = append(syncPaths, trie.NewSyncPath([]byte(path)))
+	syncPaths := make([]trie.SyncPath, len(paths))
+	for i, path := range paths {
+		syncPaths[i] = trie.NewSyncPath([]byte(path))
 	}
 	n := &healRequestSort{paths, hashes, syncPaths}
 	sort.Sort(n)