From 1da284a841109a0a0674f43aa95f19386b95b457 Mon Sep 17 00:00:00 2001
From: Dionisio <dpozo@futurespace.es>
Date: Mon, 23 Feb 2026 22:41:50 +0100
Subject: [PATCH] perf: move 512KB I/O buffer from stack to heap in chunked
 upload assembly

- Async Future size drops from ~525KB to ~5KB
- Eliminates stack overflow risk and reduces work-stealing copy cost
---
 src/infrastructure/services/chunked_upload_service.rs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/infrastructure/services/chunked_upload_service.rs b/src/infrastructure/services/chunked_upload_service.rs
index 17684e5e..f9a6b548 100644
--- a/src/infrastructure/services/chunked_upload_service.rs
+++ b/src/infrastructure/services/chunked_upload_service.rs
@@ -648,7 +648,7 @@ impl ChunkedUploadService {
             let mut chunk_file = File::open(&chunk_path)
                 .await
                 .map_err(|e| format!("Failed to open chunk {}: {}", chunk.index, e))?;
-            let mut buf = [0u8; 524_288];
+            let mut buf = vec![0u8; 524_288];
             loop {
                 let n = tokio::io::AsyncReadExt::read(&mut chunk_file, &mut buf)
                     .await