From 6835e78280a7435bc57aa024c6590e454f3dea18 Mon Sep 17 00:00:00 2001
From: Michael Vogt <mtpfeif@gmail.com>
Date: Sat, 7 Mar 2026 22:25:03 -0600
Subject: [PATCH] perf(ejson): early bail-out on key count mismatch in
 EJSON.equals

---
 packages/ejson/ejson.js | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/packages/ejson/ejson.js b/packages/ejson/ejson.js
index 76ef364651..bdd0be6181 100644
--- a/packages/ejson/ejson.js
+++ b/packages/ejson/ejson.js
@@ -518,6 +518,9 @@ EJSON.equals = (a, b, options) => {
   let ret;
   const aKeys = keysOf(a);
   const bKeys = keysOf(b);
+  if (aKeys.length !== bKeys.length) {
+    return false;
+  }
   if (keyOrderSensitive) {
     i = 0;
     ret = aKeys.every(key => {