From 28755b9e781bc82ca58d30267ae505a5db7ecc72 Mon Sep 17 00:00:00 2001
From: trevorprater <trevor.prater@gmail.com>
Date: Fri, 3 Jul 2026 00:55:20 -0400
Subject: [PATCH] Improve parseInt short number path

---
 bytes.go | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/bytes.go b/bytes.go
index f5414b6f..da97fb24 100644
--- a/bytes.go
+++ b/bytes.go
@@ -7,13 +7,34 @@ const maxUint64 = 1<<64 - 1
 
 // About 2x faster then strconv.ParseInt because it only supports base 10, which is enough for JSON
 func parseInt(bytes []byte) (v int64, ok bool, overflow bool) {
-	if len(bytes) == 0 {
+	l := len(bytes)
+	if l == 0 {
 		return 0, false, false
 	}
 
 	var neg bool = false
+	i := 0
 	if bytes[0] == '-' {
 		neg = true
+		i = 1
+	}
+
+	if l-i < 19 {
+		for ; i < l; i++ {
+			d := bytes[i] - '0'
+			if d > 9 {
+				return 0, false, false
+			}
+			v = 10*v + int64(d)
+		}
+
+		if neg {
+			return -v, true, false
+		}
+		return v, true, false
+	}
+
+	if neg {
 		bytes = bytes[1:]
 	}