perf(parse): cut allocations and validate UTF-8 in the scan

2026-09-20 22:15:10 +02:00
parent adf189aa2c
commit b4d564c682
6 changed files with 427 additions and 117 deletions
@@ -41,6 +41,15 @@ func decodeDecimalInt(tok string) (any, error) {
 	if err := checkNoLeadingZero(digits); err != nil {
 		return nil, err
 	}
+	// An unsigned token parses in place; only a sign needs the concatenated
+	// copy, and concatenating an empty sign still allocated.
+	if sign == "" {
+		i, err := strconv.ParseInt(digits, 10, 64)
+		if err != nil {
+			return nil, fmt.Errorf("integer %q out of range", tok)
+		}
+		return i, nil
+	}
 	i, err := strconv.ParseInt(sign+digits, 10, 64)
 	if err != nil {
 		return nil, fmt.Errorf("integer %q out of range", tok)