From b2e7bab92044031a495a53b4ccc31c84137f4319 Mon Sep 17 00:00:00 2001
From: Molly <molly.cn.mail@gmail.com>
Date: Fri, 25 Aug 2023 13:49:34 -0400
Subject: [PATCH] caching result of reading storage variable to save gas
 (#4535)

---
 contracts/proxy/utils/Initializable.sol | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/contracts/proxy/utils/Initializable.sol b/contracts/proxy/utils/Initializable.sol
index 7f33a6267..ac97a06fb 100644
--- a/contracts/proxy/utils/Initializable.sol
+++ b/contracts/proxy/utils/Initializable.sol
@@ -106,7 +106,8 @@ abstract contract Initializable {
         InitializableStorage storage $ = _getInitializableStorage();
 
         bool isTopLevelCall = !$._initializing;
-        if (!(isTopLevelCall && $._initialized < 1) && !(address(this).code.length == 0 && $._initialized == 1)) {
+        uint64 initialized = $._initialized;
+        if (!(isTopLevelCall && initialized < 1) && !(address(this).code.length == 0 && initialized == 1)) {
             revert AlreadyInitialized();
         }
         $._initialized = 1;