From 2fdf25dff2e9984d3a8f8e5e612ea802c88e88a1 Mon Sep 17 00:00:00 2001
From: Jabar Asadi <jasadi@d2iq.com>
Date: Sat, 27 May 2023 21:47:40 +0200
Subject: [PATCH] os:ReadFile: don't check for re-allocation in the first
 iteration

---
 src/os/file.go | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/src/os/file.go b/src/os/file.go
index 7fd2f5d202..5897f08829 100644
--- a/src/os/file.go
+++ b/src/os/file.go
@@ -737,10 +737,6 @@ func ReadFile(name string) ([]byte, error) {
 
 	data := make([]byte, 0, size)
 	for {
-		if len(data) >= cap(data) {
-			d := append(data[:cap(data)], 0)
-			data = d[:len(data)]
-		}
 		n, err := f.Read(data[len(data):cap(data)])
 		data = data[:len(data)+n]
 		if err != nil {
@@ -749,6 +745,11 @@ func ReadFile(name string) ([]byte, error) {
 			}
 			return data, err
 		}
+
+		if len(data) >= cap(data) {
+			d := append(data[:cap(data)], 0)
+			data = d[:len(data)]
+		}
 	}
 }