From 1242d08118f304b48d048baf5c073a9021a932bf Mon Sep 17 00:00:00 2001
From: ightevenmckane187 <214069160+ightevenmckane187@users.noreply.github.com>
Date: Sun, 23 Aug 2026 15:13:14 +0000
Subject: [PATCH] =?UTF-8?q?=E2=9A=A1=20Bolt:=20optimize=20PersistenceLayer?=
 =?UTF-8?q?.save=20buffer=20allocations?=
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Fixed syntax/reference errors in `PersistenceLayer.save` and optimized serialization performance. Pre-allocates a single output buffer using `Buffer.allocUnsafe`, writes string payload directly into destination buffer via `out.write()`, and calculates HMAC signature directly from string payload to avoid intermediate payload Buffer allocations and double buffer copying.
---
 src/os/persistence/PersistenceLayer.ts | 28 ++++++++++----------------
 1 file changed, 11 insertions(+), 17 deletions(-)

diff --git a/src/os/persistence/PersistenceLayer.ts b/src/os/persistence/PersistenceLayer.ts
index b60a349..4108039 100644
--- a/src/os/persistence/PersistenceLayer.ts
+++ b/src/os/persistence/PersistenceLayer.ts
@@ -13,31 +13,25 @@ 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);
-
-        // Compute and write HMAC signature directly
-        const hmac = crypto.createHmac('sha256',. key);
-        hmac.update(payloadBuf);
-        const signature = hmac.digest();
-        outBuf.set(signature, 6);
-
         const payloadByteLength = Buffer.byteLength(payload, 'utf8');
+
+        // Bolt Optimization: Allocate pre-sized buffer to eliminate Buffer.concat and intermediate allocations
         const out = Buffer.allocUnsafe(HEADER_LENGTH + SIGNATURE_LENGTH + payloadByteLength);
 
         // Zero-copy set of pre-allocated header
         out.set(HEADER_MAGIC, 0);
-        // Zero-copy set of hmac signature
-        out.set(signature, HEADER_LENGTH);
+
         // Direct UTF-8 write of the payload to avoid intermediate Buffer allocation
         out.write(payload, HEADER_LENGTH + SIGNATURE_LENGTH, payloadByteLength, 'utf8');
 
+        // Compute HMAC signature directly from string payload without intermediate buffer
+        const hmac = crypto.createHmac('sha256', key);
+        hmac.update(payload);
+        const signature = hmac.digest();
+
+        // Zero-copy set of hmac signature
+        out.set(signature, HEADER_LENGTH);
+
         return out;
     }