From 714ef5c563b79595281a0c844a295b90fc9dcdcc Mon Sep 17 00:00:00 2001
From: Fabrice Vaillant <fabrice.vaillant@adevinta.com>
Date: Fri, 17 Jan 2025 10:06:48 +0100
Subject: [PATCH] Favor strings.Cut to strings.SplitN

It is more efficient since it does not allocate an array and just return
s if nothing found

For the same reason we don't need to use  strings.Cut at all if empty
---
 mapstructure.go | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mapstructure.go b/mapstructure.go
index e77e63ba..56c749bf 100644
--- a/mapstructure.go
+++ b/mapstructure.go
@@ -1434,8 +1434,8 @@ func (d *Decoder) decodeStructFromMap(name string, dataVal, val reflect.Value) e
 		if tagValue == "" && d.config.IgnoreUntaggedFields {
 			continue
 		}
-		tagValue = strings.SplitN(tagValue, ",", 2)[0]
 		if tagValue != "" {
+			tagValue, _, _ = strings.Cut(tagValue, ",")
 			fieldName = tagValue
 		}