From 0d4942836a3a3ca9085df087f2509216075197e4 Mon Sep 17 00:00:00 2001
From: Ruben Bridgewater <ruben@bridgewater.de>
Date: Wed, 3 Apr 2019 02:58:31 +0200
Subject: [PATCH] fs: improve readFile performance

This increases the maximum buffer size per read to 256kb when using
`fs.readFile`. This is important to improve the read performance for
bigger files.

Refs: https://github.com/nodejs/node/issues/25741
---
 lib/internal/fs/read_file_context.js | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/lib/internal/fs/read_file_context.js b/lib/internal/fs/read_file_context.js
index 4961ee820a7e84..5397049b809149 100644
--- a/lib/internal/fs/read_file_context.js
+++ b/lib/internal/fs/read_file_context.js
@@ -79,7 +79,8 @@ class ReadFileContext {
     } else {
       buffer = this.buffer;
       offset = this.pos;
-      length = Math.min(kReadFileBufferLength, this.size - this.pos);
+      // Read up to 256kb.
+      length = Math.min(256 * 1024, this.size - this.pos);
     }
 
     const req = new FSReqCallback();