From 5f8b64c646ea840627ad8700483bbc50a008f6a4 Mon Sep 17 00:00:00 2001
From: Darien Raymond <admin@v2ray.com>
Date: Fri, 17 Aug 2018 11:52:55 +0200
Subject: [PATCH] use SingleReader on low end devices

---
 common/buf/io.go         | 13 +------------
 common/buf/io_highend.go | 23 +++++++++++++++++++++++
 common/buf/io_lowend.go  | 13 +++++++++++++
 3 files changed, 37 insertions(+), 12 deletions(-)
 create mode 100644 common/buf/io_highend.go
 create mode 100644 common/buf/io_lowend.go

diff --git a/common/buf/io.go b/common/buf/io.go
index 71794b69..182b61ed 100644
--- a/common/buf/io.go
+++ b/common/buf/io.go
@@ -59,18 +59,7 @@ func NewReader(reader io.Reader) Reader {
 		return mr
 	}
 
-	if useReadv {
-		if sc, ok := reader.(syscall.Conn); ok {
-			rawConn, err := sc.SyscallConn()
-			if err != nil {
-				newError("failed to get sysconn").Base(err).WriteToLog()
-			} else {
-				return NewReadVReader(reader, rawConn)
-			}
-		}
-	}
-
-	return NewBytesToBufferReader(reader)
+	return newReaderPlatform(reader)
 }
 
 // NewWriter creates a new Writer.
diff --git a/common/buf/io_highend.go b/common/buf/io_highend.go
new file mode 100644
index 00000000..b461690d
--- /dev/null
+++ b/common/buf/io_highend.go
@@ -0,0 +1,23 @@
+// +build 386 amd64 s390 s390x
+
+package buf
+
+import (
+	"io"
+	"syscall"
+)
+
+func newReaderPlatform(reader io.Reader) Reader {
+	if useReadv {
+		if sc, ok := reader.(syscall.Conn); ok {
+			rawConn, err := sc.SyscallConn()
+			if err != nil {
+				newError("failed to get sysconn").Base(err).WriteToLog()
+			} else {
+				return NewReadVReader(reader, rawConn)
+			}
+		}
+	}
+
+	return NewBytesToBufferReader(reader)
+}
diff --git a/common/buf/io_lowend.go b/common/buf/io_lowend.go
new file mode 100644
index 00000000..83ab8f38
--- /dev/null
+++ b/common/buf/io_lowend.go
@@ -0,0 +1,13 @@
+// +build mips mipsle mips64 mips64le arm arm64
+
+package buf
+
+import (
+	"io"
+)
+
+func newReaderPlatform(reader io.Reader) Reader {
+	return &SingleReader{
+		Reader: reader,
+	}
+}