From e582832643f90ef2a82ebc3b10e0ad5814ff5d7b Mon Sep 17 00:00:00 2001
From: Anna Henningsen <anna@addaleax.net>
Date: Fri, 29 Jan 2021 14:43:08 +0100
Subject: [PATCH] fs: only use Buffer.concat in promises.readFile when
 necessary
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PR-URL: https://github.com/nodejs/node/pull/37127
Reviewed-By: Antoine du Hamel <duhamelantoine1995@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Darshan Sen <raisinten@gmail.com>
Reviewed-By: Zijian Liu <lxxyxzj@gmail.com>
Reviewed-By: Benjamin Gruenbaum <benjamingr@gmail.com>
Reviewed-By: Juan José Arboleda <soyjuanarbol@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
---
 lib/internal/fs/promises.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/internal/fs/promises.js b/lib/internal/fs/promises.js
index ccac60477ff83c..d989f8818ca786 100644
--- a/lib/internal/fs/promises.js
+++ b/lib/internal/fs/promises.js
@@ -311,7 +311,7 @@ async function readFileHandle(filehandle, options) {
       chunks.push(buffer.slice(0, bytesRead));
   } while (!endOfFile);
 
-  const result = Buffer.concat(chunks);
+  const result = chunks.length === 1 ? chunks[0] : Buffer.concat(chunks);
 
   return options.encoding ? result.toString(options.encoding) : result;
 }