From edae435ac4b40e5058d134defffc874ead81b130 Mon Sep 17 00:00:00 2001
From: "agent-think[bot]" <agent-think[bot]@users.noreply.github.com>
Date: Fri, 21 Aug 2026 19:13:49 +0000
Subject: [PATCH] dofs: Defer committed inode reads (#115)

ReadableStream's default queue can pull a chunk as soon as the stream is
created. Use a zero high water mark so blob reads begin only when a
consumer requests data across both supported stream runtimes.
---
 packages/dofs/src/fs/readFile.ts | 21 ++++++++++++---------
 1 file changed, 12 insertions(+), 9 deletions(-)

diff --git a/packages/dofs/src/fs/readFile.ts b/packages/dofs/src/fs/readFile.ts
index e5c16bab..a8b5d4fc 100644
--- a/packages/dofs/src/fs/readFile.ts
+++ b/packages/dofs/src/fs/readFile.ts
@@ -156,16 +156,19 @@ export function readCommittedFileByInode(
   assertDenseRange(chunks, 0, lastIdx, path);
 
   let index = 0;
-  return new ReadableStream<Uint8Array>({
-    pull(controller) {
-      if (index >= chunks.length) {
-        controller.close();
-        return;
-      }
-      const chunk = chunks[index++];
-      controller.enqueue(rangedChunkBytes(db, path, chunk, 0, size));
+  return new ReadableStream<Uint8Array>(
+    {
+      pull(controller) {
+        if (index >= chunks.length) {
+          controller.close();
+          return;
+        }
+        const chunk = chunks[index++];
+        controller.enqueue(rangedChunkBytes(db, path, chunk, 0, size));
+      },
     },
-  });
+    { highWaterMark: 0 },
+  );
 }
 
 function validateReadWindow(