From 785f68d45cdebb0b20c5952fceb9e6391991c8ce Mon Sep 17 00:00:00 2001
From: Jerel Miller <jerelmiller@gmail.com>
Date: Thu, 18 May 2023 10:00:37 -0600
Subject: [PATCH] Avoid allocating new arrays when computing updated value in
 variables

Co-authored-by: Ben Newman <ben@apollographql.com>
---
 .../remove-typename/removeTypenameFromVariables.ts | 14 +++++++-------
 1 file changed, 7 insertions(+), 7 deletions(-)

diff --git a/src/link/remove-typename/removeTypenameFromVariables.ts b/src/link/remove-typename/removeTypenameFromVariables.ts
index 8c89c2bad2e..fe0ea6b49ac 100644
--- a/src/link/remove-typename/removeTypenameFromVariables.ts
+++ b/src/link/remove-typename/removeTypenameFromVariables.ts
@@ -43,16 +43,16 @@ function maybeStripTypenameUsingConfig(
   const variableDefinitions = getVariableDefinitions(query);
 
   return Object.fromEntries(
-    Object.entries(variables).map(([key, value]) => {
+    Object.entries(variables).map((keyVal) => {
+      const [key, value] = keyVal;
       const typename = variableDefinitions[key];
       const typenameConfig = config[typename];
 
-      return [
-        key,
-        typenameConfig
-          ? maybeStripTypename(value, typenameConfig)
-          : stripTypename(value),
-      ];
+      keyVal[1] = typenameConfig
+        ? maybeStripTypename(value, typenameConfig)
+        : stripTypename(value);
+
+      return keyVal;
     })
   );
 }