From e0c802bec7567a60102681d6429c282dff948efd Mon Sep 17 00:00:00 2001
From: ightevenmckane187 <214069160+ightevenmckane187@users.noreply.github.com>
Date: Tue, 18 Aug 2026 15:09:49 +0000
Subject: [PATCH] perf(persistence): eliminate redundant intermediate Buffer
 allocations during save

- Pass payload string directly to crypto.createHmac with utf8 encoding
- Remove unused payloadBuf and outBuf intermediate allocations
- Fix typo in createHmac call in PersistenceLayer.ts
---
 src/os/persistence/PersistenceLayer.ts | 18 +++++-------------
 1 file changed, 5 insertions(+), 13 deletions(-)

diff --git a/src/os/persistence/PersistenceLayer.ts b/src/os/persistence/PersistenceLayer.ts
index b60a349..98f3552 100644
--- a/src/os/persistence/PersistenceLayer.ts
+++ b/src/os/persistence/PersistenceLayer.ts
@@ -13,22 +13,14 @@ export class PersistenceLayer {
      */
     save(data: any, key: string): Buffer {
         const payload = JSON.stringify(data);
-        const payloadBuf = Buffer.from(payload, 'utf8');
-
-        // Bolt Optimization: Allocate unsafe buffer for exact combined size to avoid Buffer.concat and intermediate payload allocations
-        const outBuf = Buffer.allocUnsafe(38 + payloadBuf.length);
-
-        // Copy pre-allocated header and payload
-        outBuf.set(HEADER_BUF, 0);
-        outBuf.set(payloadBuf, 38);
+        const payloadByteLength = Buffer.byteLength(payload, 'utf8');
 
-        // Compute and write HMAC signature directly
-        const hmac = crypto.createHmac('sha256',. key);
-        hmac.update(payloadBuf);
+        // Bolt Optimization: Compute HMAC directly on payload string to avoid extra Buffer allocations
+        const hmac = crypto.createHmac('sha256', key);
+        hmac.update(payload, 'utf8');
         const signature = hmac.digest();
-        outBuf.set(signature, 6);
 
-        const payloadByteLength = Buffer.byteLength(payload, 'utf8');
+        // Bolt Optimization: Allocate unsafe buffer for exact combined size to avoid Buffer.concat and intermediate payload allocations
         const out = Buffer.allocUnsafe(HEADER_LENGTH + SIGNATURE_LENGTH + payloadByteLength);
 
         // Zero-copy set of pre-allocated header