From 0a9930a230cf7fe8e2f7d431fc85a7f21517d39b Mon Sep 17 00:00:00 2001
From: Gil Pedersen <git@gpost.dk>
Date: Thu, 14 Feb 2013 20:26:54 +0100
Subject: [PATCH] stream: Pipe data in chunks matching read data

This creates better flow for large values of lowWaterMark.
---
 lib/_stream_readable.js | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/lib/_stream_readable.js b/lib/_stream_readable.js
index 825042b..333a3a0 100644
--- a/lib/_stream_readable.js
+++ b/lib/_stream_readable.js
@@ -137,8 +137,13 @@ function howMuchToRead(n, state) {
   if (state.objectMode)
     return n === 0 ? 0 : 1;
 
-  if (isNaN(n) || n === null)
-    return state.length;
+  if (isNaN(n) || n === null) {
+    // only flow one buffer at a time
+    if (state.flowing && state.buffer.length)
+      return state.buffer[0].length;
+    else
+      return state.length;
+  }
 
   if (n <= 0)
     return 0;
-- 
2.7.4