From b5c8f6407b74466ed0d2989000458cb59239e9af Mon Sep 17 00:00:00 2001
From: Arda TANRIKULU <ardatanrikulu@gmail.com>
Date: Mon, 6 Feb 2023 15:45:29 +0300
Subject: [PATCH] Introduce `memoize2of5` and fix `memoize2of4`

---
 .changeset/sweet-socks-clap.md |  5 +++++
 packages/utils/src/memoize.ts  | 25 ++++++++++++++++++++++++-
 2 files changed, 29 insertions(+), 1 deletion(-)
 create mode 100644 .changeset/sweet-socks-clap.md

diff --git a/.changeset/sweet-socks-clap.md b/.changeset/sweet-socks-clap.md
new file mode 100644
index 00000000000..1634a0083d2
--- /dev/null
+++ b/.changeset/sweet-socks-clap.md
@@ -0,0 +1,5 @@
+---
+'@graphql-tools/utils': patch
+---
+
+Do not use a global `WeakMap` for `memoize2of4`, and introduce `memoize2of5`
diff --git a/packages/utils/src/memoize.ts b/packages/utils/src/memoize.ts
index 7f68a4133d0..83e60118a52 100644
--- a/packages/utils/src/memoize.ts
+++ b/packages/utils/src/memoize.ts
@@ -178,8 +178,8 @@ export function memoize5<F extends (a1: any, a2: any, a3: any, a4: any, a5: any)
   } as F;
 }
 
-const memoize2of4cache: WeakMap<Record<string, any>, WeakMap<Record<string, any>, any>> = new WeakMap();
 export function memoize2of4<F extends (a1: any, a2: any, a3: any, a4: any) => any>(fn: F): F {
+  const memoize2of4cache: WeakMap<Record<string, any>, WeakMap<Record<string, any>, any>> = new WeakMap();
   return function memoized(a1: any, a2: any, a3: any, a4: any): any {
     let cache2 = memoize2of4cache.get(a1);
     if (!cache2) {
@@ -200,3 +200,26 @@ export function memoize2of4<F extends (a1: any, a2: any, a3: any, a4: any) => an
     return cachedValue;
   } as F;
 }
+
+export function memoize2of5<F extends (a1: any, a2: any, a3: any, a4: any, a5: any) => any>(fn: F): F {
+  const memoize2of4cache: WeakMap<Record<string, any>, WeakMap<Record<string, any>, any>> = new WeakMap();
+  return function memoized(a1: any, a2: any, a3: any, a4: any, a5: any): any {
+    let cache2 = memoize2of4cache.get(a1);
+    if (!cache2) {
+      cache2 = new WeakMap();
+      memoize2of4cache.set(a1, cache2);
+      const newValue = fn(a1, a2, a3, a4, a5);
+      cache2.set(a2, newValue);
+      return newValue;
+    }
+
+    const cachedValue = cache2.get(a2);
+    if (cachedValue === undefined) {
+      const newValue = fn(a1, a2, a3, a4, a5);
+      cache2.set(a2, newValue);
+      return newValue;
+    }
+
+    return cachedValue;
+  } as F;
+}