From 3347248d82007c9f6b9f21e6eb657a37b5dea488 Mon Sep 17 00:00:00 2001
From: Nathan West <Lucretiel@gmail.com>
Date: Thu, 17 Nov 2022 10:56:11 -0500
Subject: [PATCH] Add `clone_from` to `Map`; `Map::append` now uses
 `IndexMap::extend`

---
 src/map.rs | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/src/map.rs b/src/map.rs
index 87cf54566..c17920bd9 100644
--- a/src/map.rs
+++ b/src/map.rs
@@ -197,9 +197,8 @@ impl Map<String, Value> {
     #[inline]
     pub fn append(&mut self, other: &mut Self) {
         #[cfg(feature = "preserve_order")]
-        for (k, v) in mem::replace(&mut other.map, MapImpl::default()) {
-            self.map.insert(k, v);
-        }
+        self.map
+            .extend(mem::replace(&mut other.map, MapImpl::default()));
         #[cfg(not(feature = "preserve_order"))]
         self.map.append(&mut other.map);
     }
@@ -304,6 +303,11 @@ impl Clone for Map<String, Value> {
             map: self.map.clone(),
         }
     }
+
+    #[inline]
+    fn clone_from(&mut self, source: &Self) {
+        self.map.clone_from(&source.map)
+    }
 }
 
 impl PartialEq for Map<String, Value> {