From 192cd67deb0154cf26e383927acff12916d26b7a Mon Sep 17 00:00:00 2001
From: hashlag <hashlag@hashlag.local>
Date: Thu, 30 Jul 2026 01:17:47 +0300
Subject: [PATCH] EcbMode: Optimize data management on decryption hotpath.

---
 Chaos/Cipher/Block/Mode/Ecb.hpp | 15 ++++-----------
 1 file changed, 4 insertions(+), 11 deletions(-)

diff --git a/Chaos/Cipher/Block/Mode/Ecb.hpp b/Chaos/Cipher/Block/Mode/Ecb.hpp
index 1160cd5..c2e51ca 100644
--- a/Chaos/Cipher/Block/Mode/Ecb.hpp
+++ b/Chaos/Cipher/Block/Mode/Ecb.hpp
@@ -172,8 +172,6 @@ public:
         uint64_t BlockBytesPacked_;
         BlockArray Block_;
 
-        BlockArray DecryptedBlock_;
-
         bool PreviousBlockSaved_;
         BlockArray PreviousBlock_;
 
@@ -213,22 +211,17 @@ public:
                 {
                     BlockBytesPacked_ = 0;
 
-                    Decryptor_.DecryptBlock(DecryptedBlock_.Begin(), DecryptedBlock_.End(),
-                                            Block_.Begin(), Block_.End());
-
                     if (PreviousBlockSaved_)
                     {
                         out = EnsureCopy(out, outEnd,
                                          PreviousBlock_.Begin(), PreviousBlock_.End());
-                        PreviousBlock_ = DecryptedBlock_;
 
                         written += CipherT::BlockSize;
                     }
-                    else
-                    {
-                        PreviousBlock_ = DecryptedBlock_;
-                        PreviousBlockSaved_ = true;
-                    }
+
+                    Decryptor_.DecryptBlock(PreviousBlock_.Begin(), PreviousBlock_.End(),
+                                            Block_.Begin(), Block_.End());
+                    PreviousBlockSaved_ = true;
                 }
             }