Try to optimize pipe performance

Bumps [golang.org/x/net](https://github.com/golang/net) from 0.47.0 to 0.48.0.
- [Commits](https://github.com/golang/net/compare/v0.47.0...v0.48.0)

---
updated-dependencies:
- dependency-name: golang.org/x/net
  dependency-version: 0.48.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

app/dns/fakedns/fake.go

@@ -4,7 +4,6 @@ import (
 	"context"
 	"math"
 	"math/big"
-	gonet "net"
 	"sync"
 	"time"
 
@@ -17,7 +16,7 @@ import (
 
 type Holder struct {
 	domainToIP cache.Lru
-	ipRange    *gonet.IPNet
+	ipRange    *net.IPNet
 	mu         *sync.Mutex
 
 	config *FakeDnsPool
@@ -79,10 +78,10 @@ func (fkdns *Holder) initializeFromConfig() error {
 }
 
 func (fkdns *Holder) initialize(ipPoolCidr string, lruSize int) error {
-	var ipRange *gonet.IPNet
+	var ipRange *net.IPNet
 	var err error
 
-	if _, ipRange, err = gonet.ParseCIDR(ipPoolCidr); err != nil {
+	if _, ipRange, err = net.ParseCIDR(ipPoolCidr); err != nil {
 		return errors.New("Unable to parse CIDR for Fake DNS IP assignment").Base(err).AtError()
 	}
 

app/dns/fakedns/fakedns_test.go

@@ -1,7 +1,6 @@
 package fakedns
 
 import (
-	gonet "net"
 	"strconv"
 	"testing"
 
@@ -155,7 +154,7 @@ func TestFakeDNSMulti(t *testing.T) {
 			assert.True(t, inPool)
 		})
 		t.Run("ipv6", func(t *testing.T) {
-			ip, err := gonet.ResolveIPAddr("ip", "fddd:c5b4:ff5f:f4f0::5")
+			ip, err := net.ResolveIPAddr("ip", "fddd:c5b4:ff5f:f4f0::5")
 			assert.Nil(t, err)
 			inPool := fakeMulti.IsIPInIPPool(net.IPAddress(ip.IP))
 			assert.True(t, inPool)
@@ -165,7 +164,7 @@ func TestFakeDNSMulti(t *testing.T) {
 			assert.False(t, inPool)
 		})
 		t.Run("ipv6_inverse", func(t *testing.T) {
-			ip, err := gonet.ResolveIPAddr("ip", "fcdd:c5b4:ff5f:f4f0::5")
+			ip, err := net.ResolveIPAddr("ip", "fcdd:c5b4:ff5f:f4f0::5")
 			assert.Nil(t, err)
 			inPool := fakeMulti.IsIPInIPPool(net.IPAddress(ip.IP))
 			assert.False(t, inPool)

app/proxyman/inbound/worker.go

@@ -2,7 +2,6 @@ package inbound
 
 import (
 	"context"
-	gonet "net"
 	"sync"
 	"sync/atomic"
 	"time"
@@ -565,12 +564,12 @@ func (w *dsWorker) Close() error {
 }
 
 func IsLocal(ip net.IP) bool {
-	addrs, err := gonet.InterfaceAddrs()
+	addrs, err := net.InterfaceAddrs()
 	if err != nil {
 		return false
 	}
 	for _, addr := range addrs {
-		if ipnet, ok := addr.(*gonet.IPNet); ok {
+		if ipnet, ok := addr.(*net.IPNet); ok {
 			if ipnet.IP.Equal(ip) {
 				return true
 			}

app/proxyman/outbound/handler.go

@@ -6,7 +6,6 @@ import (
 	goerrors "errors"
 	"io"
 	"math/big"
-	gonet "net"
 	"os"
 
 	"github.com/xtls/xray-core/common/dice"
@@ -398,7 +397,7 @@ func (h *Handler) ProxySettings() *serial.TypedMessage {
 
 func ParseRandomIP(addr net.Address, prefix string) net.Address {
 
-	_, ipnet, _ := gonet.ParseCIDR(addr.IP().String() + "/" + prefix)
+	_, ipnet, _ := net.ParseCIDR(addr.IP().String() + "/" + prefix)
 
 	ones, bits := ipnet.Mask.Size()
 	subnetSize := new(big.Int).Lsh(big.NewInt(1), uint(bits-ones))
@@ -412,5 +411,5 @@ func ParseRandomIP(addr net.Address, prefix string) net.Address {
 	padded := make([]byte, len(ipnet.IP))
 	copy(padded[len(padded)-len(rndBytes):], rndBytes)
 
-	return net.ParseAddress(gonet.IP(padded).String())
+	return net.ParseAddress(net.IP(padded).String())
 }

common/net/system.go

@@ -12,6 +12,8 @@ var (
 
 type ListenConfig = net.ListenConfig
 
+type KeepAliveConfig = net.KeepAliveConfig
+
 var (
 	Listen     = net.Listen
 	ListenTCP  = net.ListenTCP
@@ -26,6 +28,12 @@ var FileConn = net.FileConn
 // ParseIP is an alias of net.ParseIP
 var ParseIP = net.ParseIP
 
+var ParseCIDR = net.ParseCIDR
+
+var ResolveIPAddr = net.ResolveIPAddr
+
+var InterfaceByName = net.InterfaceByName
+
 var SplitHostPort = net.SplitHostPort
 
 var CIDRMask = net.CIDRMask
@@ -51,6 +59,8 @@ type (
 	UnixConn = net.UnixConn
 )
 
+type IPAddr = net.IPAddr
+
 // IP is an alias for net.IP.
 type (
 	IP     = net.IP
@@ -82,3 +92,11 @@ var (
 )
 
 type Resolver = net.Resolver
+
+var DefaultResolver = net.DefaultResolver
+
+var JoinHostPort = net.JoinHostPort
+
+var InterfaceAddrs = net.InterfaceAddrs
+
+var Interfaces = net.Interfaces

common/platform/ctlcmd/attr_other.go

@@ -1,10 +0,0 @@
-//go:build !windows
-// +build !windows
-
-package ctlcmd
-
-import "syscall"
-
-func getSysProcAttr() *syscall.SysProcAttr {
-	return nil
-}

common/platform/ctlcmd/attr_windows.go

@@ -1,12 +0,0 @@
-//go:build windows
-// +build windows
-
-package ctlcmd
-
-import "syscall"
-
-func getSysProcAttr() *syscall.SysProcAttr {
-	return &syscall.SysProcAttr{
-		HideWindow: true,
-	}
-}

common/platform/ctlcmd/ctlcmd.go

@@ -1,50 +0,0 @@
-package ctlcmd
-
-import (
-	"context"
-	"io"
-	"os"
-	"os/exec"
-	"strings"
-
-	"github.com/xtls/xray-core/common/buf"
-	"github.com/xtls/xray-core/common/errors"
-	"github.com/xtls/xray-core/common/platform"
-)
-
-func Run(args []string, input io.Reader) (buf.MultiBuffer, error) {
-	xctl := platform.GetToolLocation("xctl")
-	if _, err := os.Stat(xctl); err != nil {
-		return nil, errors.New("xctl doesn't exist").Base(err)
-	}
-
-	var errBuffer buf.MultiBufferContainer
-	var outBuffer buf.MultiBufferContainer
-
-	cmd := exec.Command(xctl, args...)
-	cmd.Stderr = &errBuffer
-	cmd.Stdout = &outBuffer
-	cmd.SysProcAttr = getSysProcAttr()
-	if input != nil {
-		cmd.Stdin = input
-	}
-
-	if err := cmd.Start(); err != nil {
-		return nil, errors.New("failed to start xctl").Base(err)
-	}
-
-	if err := cmd.Wait(); err != nil {
-		msg := "failed to execute xctl"
-		if errBuffer.Len() > 0 {
-			msg += ": \n" + strings.TrimSpace(errBuffer.MultiBuffer.String())
-		}
-		return nil, errors.New(msg).Base(err)
-	}
-
-	// log stderr, info message
-	if !errBuffer.IsEmpty() {
-		errors.LogInfo(context.Background(), "<xctl message> \n", strings.TrimSpace(errBuffer.MultiBuffer.String()))
-	}
-
-	return outBuffer.MultiBuffer, nil
-}

common/platform/others.go

@@ -8,19 +8,10 @@ import (
 	"path/filepath"
 )
 
-func ExpandEnv(s string) string {
-	return os.ExpandEnv(s)
-}
-
 func LineSeparator() string {
 	return "\n"
 }
 
-func GetToolLocation(file string) string {
-	toolPath := NewEnvFlag(ToolLocation).GetValue(getExecutableDir)
-	return filepath.Join(toolPath, file)
-}
-
 // GetAssetLocation searches for `file` in the env dir, the executable dir, and certain locations
 func GetAssetLocation(file string) string {
 	assetPath := NewEnvFlag(AssetLocation).GetValue(getExecutableDir)

common/platform/platform.go

@@ -8,10 +8,8 @@ import (
 )
 
 const (
-	PluginLocation  = "xray.location.plugin"
 	ConfigLocation  = "xray.location.config"
 	ConfdirLocation = "xray.location.confdir"
-	ToolLocation    = "xray.location.tool"
 	AssetLocation   = "xray.location.asset"
 	CertLocation    = "xray.location.cert"
 
@@ -79,17 +77,6 @@ func getExecutableDir() string {
 	return filepath.Dir(exec)
 }
 
-func getExecutableSubDir(dir string) func() string {
-	return func() string {
-		return filepath.Join(getExecutableDir(), dir)
-	}
-}
-
-func GetPluginDirectory() string {
-	pluginDir := NewEnvFlag(PluginLocation).GetValue(getExecutableSubDir("plugins"))
-	return pluginDir
-}
-
 func GetConfigurationPath() string {
 	configPath := NewEnvFlag(ConfigLocation).GetValue(getExecutableDir)
 	return filepath.Join(configPath, "config.json")

common/platform/windows.go

@@ -5,20 +5,10 @@ package platform
 
 import "path/filepath"
 
-func ExpandEnv(s string) string {
-	// TODO
-	return s
-}
-
 func LineSeparator() string {
 	return "\r\n"
 }
 
-func GetToolLocation(file string) string {
-	toolPath := NewEnvFlag(ToolLocation).GetValue(getExecutableDir)
-	return filepath.Join(toolPath, file+".exe")
-}
-
 // GetAssetLocation searches for `file` in the env dir and the executable dir
 func GetAssetLocation(file string) string {
 	assetPath := NewEnvFlag(AssetLocation).GetValue(getExecutableDir)

core/config.go

@@ -64,7 +64,7 @@ func GetMergedConfig(args cmdarg.Arg) (string, error) {
 	var files []*ConfigSource
 	supported := []string{"json", "yaml", "toml"}
 	for _, file := range args {
-		format := getFormat(file)
+		format := GetFormat(file)
 		if slices.Contains(supported, format) {
 			files = append(files, &ConfigSource{
 				Name:   file,
@@ -98,7 +98,7 @@ func getExtension(filename string) string {
 	return filename[idx+1:]
 }
 
-func getFormat(filename string) string {
+func GetFormat(filename string) string {
 	return GetFormatByExtension(getExtension(filename))
 }
 
@@ -112,7 +112,7 @@ func LoadConfig(formatName string, input interface{}) (*Config, error) {
 
 			if formatName == "auto" {
 				if file != "stdin:" {
-					f = getFormat(file)
+					f = GetFormat(file)
 				} else {
 					f = "json"
 				}

core/core.go

@@ -19,7 +19,7 @@ import (
 var (
 	Version_x byte = 25
 	Version_y byte = 12
-	Version_z byte = 1
+	Version_z byte = 8
 )
 
 var (

go.mod

@@ -21,10 +21,10 @@ require (
 	github.com/vishvananda/netlink v1.3.1
 	github.com/xtls/reality v0.0.0-20251014195629-e4eec4520535
 	go4.org/netipx v0.0.0-20231129151722-fdeea329fbba
-	golang.org/x/crypto v0.44.0
-	golang.org/x/net v0.47.0
-	golang.org/x/sync v0.18.0
-	golang.org/x/sys v0.38.0
+	golang.org/x/crypto v0.46.0
+	golang.org/x/net v0.48.0
+	golang.org/x/sync v0.19.0
+	golang.org/x/sys v0.39.0
 	golang.zx2c4.com/wireguard v0.0.0-20231211153847-12269c276173
 	google.golang.org/grpc v1.77.0
 	google.golang.org/protobuf v1.36.10
@@ -46,10 +46,10 @@ require (
 	github.com/quic-go/qpack v0.6.0 // indirect
 	github.com/riobard/go-bloom v0.0.0-20200614022211-cdc8013cb5b3 // indirect
 	github.com/vishvananda/netns v0.0.5 // indirect
-	golang.org/x/mod v0.29.0 // indirect
-	golang.org/x/text v0.31.0 // indirect
+	golang.org/x/mod v0.30.0 // indirect
+	golang.org/x/text v0.32.0 // indirect
 	golang.org/x/time v0.12.0 // indirect
-	golang.org/x/tools v0.38.0 // indirect
+	golang.org/x/tools v0.39.0 // indirect
 	golang.zx2c4.com/wintun v0.0.0-20230126152724-0fa3db229ce2 // indirect
 	google.golang.org/genproto/googleapis/rpc v0.0.0-20251022142026-3a174f9686a8 // indirect
 	gopkg.in/yaml.v2 v2.4.0 // indirect

go.sum

@@ -95,20 +95,20 @@ go4.org/netipx v0.0.0-20231129151722-fdeea329fbba h1:0b9z3AuHCjxk0x/opv64kcgZLBs
 go4.org/netipx v0.0.0-20231129151722-fdeea329fbba/go.mod h1:PLyyIXexvUFg3Owu6p/WfdlivPbZJsZdgWZlrGope/Y=
 golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
 golang.org/x/crypto v0.0.0-20191011191535-87dc89f01550/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
-golang.org/x/crypto v0.44.0 h1:A97SsFvM3AIwEEmTBiaxPPTYpDC47w720rdiiUvgoAU=
-golang.org/x/crypto v0.44.0/go.mod h1:013i+Nw79BMiQiMsOPcVCB5ZIJbYkerPrGnOa00tvmc=
+golang.org/x/crypto v0.46.0 h1:cKRW/pmt1pKAfetfu+RCEvjvZkA9RimPbh7bhFjGVBU=
+golang.org/x/crypto v0.46.0/go.mod h1:Evb/oLKmMraqjZ2iQTwDwvCtJkczlDuTmdJXoZVzqU0=
 golang.org/x/mod v0.5.1/go.mod h1:5OXOZSfqPIIbmVBIIKWRFfZjPR0E5r58TLhUjH0a2Ro=
-golang.org/x/mod v0.29.0 h1:HV8lRxZC4l2cr3Zq1LvtOsi/ThTgWnUk/y64QSs8GwA=
-golang.org/x/mod v0.29.0/go.mod h1:NyhrlYXJ2H4eJiRy/WDBO6HMqZQ6q9nk4JzS3NuCK+w=
+golang.org/x/mod v0.30.0 h1:fDEXFVZ/fmCKProc/yAXXUijritrDzahmwwefnjoPFk=
+golang.org/x/mod v0.30.0/go.mod h1:lAsf5O2EvJeSFMiBxXDki7sCgAxEUcZHXoXMKT4GJKc=
 golang.org/x/net v0.0.0-20190404232315-eb5bcb51f2a3/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
 golang.org/x/net v0.0.0-20190620200207-3b0461eec859/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
 golang.org/x/net v0.0.0-20211015210444-4f30a5c0130f/go.mod h1:9nx3DQGgdP8bBQD5qxJ1jj9UTztislL4KSBs9R2vV5Y=
-golang.org/x/net v0.47.0 h1:Mx+4dIFzqraBXUugkia1OOvlD6LemFo1ALMHjrXDOhY=
-golang.org/x/net v0.47.0/go.mod h1:/jNxtkgq5yWUGYkaZGqo27cfGZ1c5Nen03aYrrKpVRU=
+golang.org/x/net v0.48.0 h1:zyQRTTrjc33Lhh0fBgT/H3oZq9WuvRR5gPC70xpDiQU=
+golang.org/x/net v0.48.0/go.mod h1:+ndRgGjkh8FGtu1w1FGbEC31if4VrNVMuKTgcAAnQRY=
 golang.org/x/sync v0.0.0-20190423024810-112230192c58/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sync v0.0.0-20210220032951-036812b2e83c/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
-golang.org/x/sync v0.18.0 h1:kr88TuHDroi+UVf+0hZnirlk8o8T+4MrK6mr60WkH/I=
-golang.org/x/sync v0.18.0/go.mod h1:9KTHXmSnoGruLpwFjVSX0lNNA75CykiMECbovNTZqGI=
+golang.org/x/sync v0.19.0 h1:vV+1eWNmZ5geRlYjzm2adRgW2/mcpevXNg50YZtPCE4=
+golang.org/x/sync v0.19.0/go.mod h1:9KTHXmSnoGruLpwFjVSX0lNNA75CykiMECbovNTZqGI=
 golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20190412213103-97732733099d/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20201119102817-f84b799fce68/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
@@ -116,21 +116,21 @@ golang.org/x/sys v0.0.0-20210423082822-04245dca01da/go.mod h1:h1NjWce9XRLGQEsW7w
 golang.org/x/sys v0.0.0-20211019181941-9d821ace8654/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.2.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.10.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
-golang.org/x/sys v0.38.0 h1:3yZWxaJjBmCWXqhN1qh02AkOnCQ1poK6oF+a7xWL6Gc=
-golang.org/x/sys v0.38.0/go.mod h1:OgkHotnGiDImocRcuBABYBEXf8A9a87e/uXjp9XT3ks=
+golang.org/x/sys v0.39.0 h1:CvCKL8MeisomCi6qNZ+wbb0DN9E5AATixKsvNtMoMFk=
+golang.org/x/sys v0.39.0/go.mod h1:OgkHotnGiDImocRcuBABYBEXf8A9a87e/uXjp9XT3ks=
 golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=
 golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
 golang.org/x/text v0.3.6/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
 golang.org/x/text v0.3.7/go.mod h1:u+2+/6zg+i71rQMx5EYifcz6MCKuco9NR6JIITiCfzQ=
-golang.org/x/text v0.31.0 h1:aC8ghyu4JhP8VojJ2lEHBnochRno1sgL6nEi9WGFGMM=
-golang.org/x/text v0.31.0/go.mod h1:tKRAlv61yKIjGGHX/4tP1LTbc13YSec1pxVEWXzfoeM=
+golang.org/x/text v0.32.0 h1:ZD01bjUt1FQ9WJ0ClOL5vxgxOI/sVCNgX1YtKwcY0mU=
+golang.org/x/text v0.32.0/go.mod h1:o/rUWzghvpD5TXrTIBuJU77MTaN0ljMWE47kxGJQ7jY=
 golang.org/x/time v0.12.0 h1:ScB/8o8olJvc+CQPWrK3fPZNfh7qgwCrY0zJmoEQLSE=
 golang.org/x/time v0.12.0/go.mod h1:CDIdPxbZBQxdj6cxyCIdrNogrJKMJ7pr37NYpMcMDSg=
 golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
 golang.org/x/tools v0.0.0-20191119224855-298f0cb1881e/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
 golang.org/x/tools v0.1.8/go.mod h1:nABZi5QlRsZVlzPpHl034qft6wpY4eDcsTt5AaioBiU=
-golang.org/x/tools v0.38.0 h1:Hx2Xv8hISq8Lm16jvBZ2VQf+RLmbd7wVUsALibYI/IQ=
-golang.org/x/tools v0.38.0/go.mod h1:yEsQ/d/YK8cjh0L6rZlY8tgtlKiBNTL14pGDJPJpYQs=
+golang.org/x/tools v0.39.0 h1:ik4ho21kwuQln40uelmciQPp9SipgNDdrafrYA4TmQQ=
+golang.org/x/tools v0.39.0/go.mod h1:JnefbkDPyD8UU2kI5fuf8ZX4/yUeh9W877ZeBONxUqQ=
 golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 golang.org/x/xerrors v0.0.0-20191011141410-1b5146add898/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=

infra/conf/xray.go

@@ -3,8 +3,6 @@ package conf
 import (
 	"context"
 	"encoding/json"
-	"log"
-	"os"
 	"path/filepath"
 	"strings"
 
@@ -47,8 +45,6 @@ var (
 		"dns":         func() interface{} { return new(DNSOutboundConfig) },
 		"wireguard":   func() interface{} { return &WireGuardConfig{IsClient: true} },
 	}, "protocol", "settings")
-
-	ctllog = log.New(os.Stderr, "xctl> ", 0)
 )
 
 type SniffingConfig struct {

main/commands/all/convert/protobuf.go

@@ -3,7 +3,6 @@ package convert
 import (
 	"fmt"
 	"os"
-	"strings"
 
 	"github.com/xtls/xray-core/common/cmdarg"
 	creflect "github.com/xtls/xray-core/common/reflect"
@@ -61,7 +60,7 @@ func executeConvertConfigsToProtobuf(cmd *base.Command, args []string) {
 	}
 
 	if len(optFile) > 0 {
-		switch core.GetFormatByExtension(getFileExtension(optFile)){
+		switch core.GetFormat(optFile){
 		case "protobuf", "":
 			fmt.Println("Output ProtoBuf file is ", optFile)
 		default:
@@ -106,11 +105,3 @@ func executeConvertConfigsToProtobuf(cmd *base.Command, args []string) {
 		}
 	}
 }
-
-func getFileExtension(filename string) string {
-	idx := strings.LastIndexByte(filename, '.')
-	if idx == -1 {
-		return ""
-	}
-	return filename[idx+1:]
-}

main/confloader/confloader.go

@@ -10,12 +10,10 @@ import (
 
 type (
 	configFileLoader func(string) (io.Reader, error)
-	extconfigLoader  func([]string, io.Reader) (io.Reader, error)
 )
 
 var (
 	EffectiveConfigFileLoader configFileLoader
-	EffectiveExtConfigLoader  extconfigLoader
 )
 
 // LoadConfig reads from a path/url/stdin
@@ -27,13 +25,3 @@ func LoadConfig(file string) (io.Reader, error) {
 	}
 	return EffectiveConfigFileLoader(file)
 }
-
-// LoadExtConfig calls xctl to handle multiple config
-// the actual work also in external module
-func LoadExtConfig(files []string, reader io.Reader) (io.Reader, error) {
-	if EffectiveExtConfigLoader == nil {
-		return nil, errors.New("external config module not loaded").AtError()
-	}
-
-	return EffectiveExtConfigLoader(files, reader)
-}

main/confloader/external/external.go

@@ -13,7 +13,6 @@ import (
 
 	"github.com/xtls/xray-core/common/buf"
 	"github.com/xtls/xray-core/common/errors"
-	"github.com/xtls/xray-core/common/platform/ctlcmd"
 	"github.com/xtls/xray-core/main/confloader"
 )
 
@@ -129,16 +128,6 @@ func FetchUnixSocketHTTPContent(target string) ([]byte, error) {
 	return content, nil
 }
 
-func ExtConfigLoader(files []string, reader io.Reader) (io.Reader, error) {
-	buf, err := ctlcmd.Run(append([]string{"convert"}, files...), reader)
-	if err != nil {
-		return nil, err
-	}
-
-	return strings.NewReader(buf.String()), nil
-}
-
 func init() {
 	confloader.EffectiveConfigFileLoader = ConfigLoader
-	confloader.EffectiveExtConfigLoader = ExtConfigLoader
 }

proxy/proxy.go

@@ -248,7 +248,7 @@ func (w *VisionReader) ReadMultiBuffer() (buf.MultiBuffer, error) {
 			*withinPaddingBuffers = false
 			*switchToDirectCopy = true
 		} else {
-			errors.LogInfo(w.ctx, "XtlsRead unknown command ", *currentCommand, buffer.Len())
+			errors.LogDebug(w.ctx, "XtlsRead unknown command ", *currentCommand, buffer.Len())
 		}
 	}
 	if w.trafficState.NumberOfPacketToFilter > 0 {
@@ -269,9 +269,9 @@ func (w *VisionReader) ReadMultiBuffer() (buf.MultiBuffer, error) {
 		w.rawInput = nil
 
 		if inbound := session.InboundFromContext(w.ctx); inbound != nil && inbound.Conn != nil {
-			if w.isUplink && inbound.CanSpliceCopy == 2 {
-				inbound.CanSpliceCopy = 1
-			}
+			// if w.isUplink && inbound.CanSpliceCopy == 2 { // TODO: enable uplink splice
+			// 	inbound.CanSpliceCopy = 1
+			// }
 			if !w.isUplink && w.ob != nil && w.ob.CanSpliceCopy == 2 { // ob need to be passed in due to context can have more than one ob
 				w.ob.CanSpliceCopy = 1
 			}
@@ -334,9 +334,9 @@ func (w *VisionWriter) WriteMultiBuffer(mb buf.MultiBuffer) error {
 			if !w.isUplink && inbound.CanSpliceCopy == 2 {
 				inbound.CanSpliceCopy = 1
 			}
-			if w.isUplink && w.ob != nil && w.ob.CanSpliceCopy == 2 {
-				w.ob.CanSpliceCopy = 1
-			}
+			// if w.isUplink && w.ob != nil && w.ob.CanSpliceCopy == 2 { // TODO: enable uplink splice
+			// 	w.ob.CanSpliceCopy = 1
+			// }
 		}
 		rawConn, _, writerCounter := UnwrapRawConn(w.conn)
 		w.Writer = buf.NewWriter(rawConn)
@@ -478,7 +478,7 @@ func ReshapeMultiBuffer(ctx context.Context, buffer buf.MultiBuffer) buf.MultiBu
 		buffer[i] = nil
 	}
 	buffer = buffer[:0]
-	errors.LogInfo(ctx, "ReshapeMultiBuffer ", toPrint)
+	errors.LogDebug(ctx, "ReshapeMultiBuffer ", toPrint)
 	return mb2
 }
 
@@ -517,7 +517,7 @@ func XtlsPadding(b *buf.Buffer, command byte, userUUID *[]byte, longPadding bool
 		b = nil
 	}
 	newbuffer.Extend(paddingLen)
-	errors.LogInfo(ctx, "XtlsPadding ", contentLen, " ", paddingLen, " ", command)
+	errors.LogDebug(ctx, "XtlsPadding ", contentLen, " ", paddingLen, " ", command)
 	return newbuffer
 }
 
@@ -564,7 +564,7 @@ func XtlsUnpadding(b *buf.Buffer, s *TrafficState, isUplink bool, ctx context.Co
 				*remainingPadding = int32(data) << 8
 			case 1:
 				*remainingPadding = *remainingPadding | int32(data)
-				errors.LogInfo(ctx, "Xtls Unpadding new block, content ", *remainingContent, " padding ", *remainingPadding, " command ", *currentCommand)
+				errors.LogDebug(ctx, "Xtls Unpadding new block, content ", *remainingContent, " padding ", *remainingPadding, " command ", *currentCommand)
 			}
 			*remainingCommand--
 		} else if *remainingContent > 0 {
@@ -623,11 +623,11 @@ func XtlsFilterTls(buffer buf.MultiBuffer, trafficState *TrafficState, ctx conte
 					cipherSuite := b.BytesRange(43+sessionIdLen+1, 43+sessionIdLen+3)
 					trafficState.Cipher = uint16(cipherSuite[0])<<8 | uint16(cipherSuite[1])
 				} else {
-					errors.LogInfo(ctx, "XtlsFilterTls short server hello, tls 1.2 or older? ", b.Len(), " ", trafficState.RemainingServerHello)
+					errors.LogDebug(ctx, "XtlsFilterTls short server hello, tls 1.2 or older? ", b.Len(), " ", trafficState.RemainingServerHello)
 				}
 			} else if bytes.Equal(TlsClientHandShakeStart, startsBytes[:2]) && startsBytes[5] == TlsHandshakeTypeClientHello {
 				trafficState.IsTLS = true
-				errors.LogInfo(ctx, "XtlsFilterTls found tls client hello! ", buffer.Len())
+				errors.LogDebug(ctx, "XtlsFilterTls found tls client hello! ", buffer.Len())
 			}
 		}
 		if trafficState.RemainingServerHello > 0 {
@@ -643,18 +643,18 @@ func XtlsFilterTls(buffer buf.MultiBuffer, trafficState *TrafficState, ctx conte
 				} else if v != "TLS_AES_128_CCM_8_SHA256" {
 					trafficState.EnableXtls = true
 				}
-				errors.LogInfo(ctx, "XtlsFilterTls found tls 1.3! ", b.Len(), " ", v)
+				errors.LogDebug(ctx, "XtlsFilterTls found tls 1.3! ", b.Len(), " ", v)
 				trafficState.NumberOfPacketToFilter = 0
 				return
 			} else if trafficState.RemainingServerHello <= 0 {
-				errors.LogInfo(ctx, "XtlsFilterTls found tls 1.2! ", b.Len())
+				errors.LogDebug(ctx, "XtlsFilterTls found tls 1.2! ", b.Len())
 				trafficState.NumberOfPacketToFilter = 0
 				return
 			}
-			errors.LogInfo(ctx, "XtlsFilterTls inconclusive server hello ", b.Len(), " ", trafficState.RemainingServerHello)
+			errors.LogDebug(ctx, "XtlsFilterTls inconclusive server hello ", b.Len(), " ", trafficState.RemainingServerHello)
 		}
 		if trafficState.NumberOfPacketToFilter <= 0 {
-			errors.LogInfo(ctx, "XtlsFilterTls stop filtering", buffer.Len())
+			errors.LogDebug(ctx, "XtlsFilterTls stop filtering", buffer.Len())
 		}
 	}
 }
@@ -736,7 +736,7 @@ func CopyRawConnIfExist(ctx context.Context, readerConn net.Conn, writerConn net
 			}
 		}
 		if splice {
-			errors.LogInfo(ctx, "CopyRawConn splice")
+			errors.LogDebug(ctx, "CopyRawConn splice")
 			statWriter, _ := writer.(*dispatcher.SizeStatWriter)
 			//runtime.Gosched() // necessary
 			time.Sleep(time.Millisecond)     // without this, there will be a rare ssl error for freedom splice
@@ -779,7 +779,7 @@ func CopyRawConnIfExist(ctx context.Context, readerConn net.Conn, writerConn net
 }
 
 func readV(ctx context.Context, reader buf.Reader, writer buf.Writer, timer signal.ActivityUpdater, readCounter stats.Counter) error {
-	errors.LogInfo(ctx, "CopyRawConn (maybe) readv")
+	errors.LogDebug(ctx, "CopyRawConn (maybe) readv")
 	if err := buf.Copy(reader, writer, buf.UpdateActivity(timer), buf.AddToStatCounter(readCounter)); err != nil {
 		return errors.New("failed to process response").Base(err)
 	}

proxy/vless/outbound/outbound.go

@@ -57,7 +57,12 @@ type Handler struct {
 
 	testpre  uint32
 	initpre  sync.Once
-	preConns chan stat.Connection
+	preConns chan *ConnExpire
+}
+
+type ConnExpire struct {
+	Conn   stat.Connection
+	Expire time.Time
 }
 
 // New creates a new VLess outbound handler.
@@ -141,25 +146,33 @@ func (h *Handler) Process(ctx context.Context, link *transport.Link, dialer inte
 
 	if h.testpre > 0 && h.reverse == nil {
 		h.initpre.Do(func() {
-			h.preConns = make(chan stat.Connection)
+			h.preConns = make(chan *ConnExpire)
 			for range h.testpre { // TODO: randomize
 				go func() {
 					defer func() { recover() }()
 					ctx := xctx.ContextWithID(context.Background(), session.NewID())
 					for {
-						time.Sleep(time.Millisecond * 200) // TODO: randomize
 						conn, err := dialer.Dial(ctx, rec.Destination)
 						if err != nil {
 							errors.LogWarningInner(ctx, err, "pre-connect failed")
 							continue
 						}
-						h.preConns <- conn
+						h.preConns <- &ConnExpire{Conn: conn, Expire: time.Now().Add(time.Minute * 2)} // TODO: customize & randomize
+						time.Sleep(time.Millisecond * 200)                                             // TODO: customize & randomize
 					}
 				}()
 			}
 		})
-		if conn = <-h.preConns; conn == nil {
-			return errors.New("closed handler").AtWarning()
+		for {
+			connTime := <-h.preConns
+			if connTime == nil {
+				return errors.New("closed handler").AtWarning()
+			}
+			if time.Now().Before(connTime.Expire) {
+				conn = connTime.Conn
+				break
+			}
+			connTime.Conn.Close()
 		}
 	}
 

proxy/wireguard/bind.go

@@ -3,14 +3,13 @@ package wireguard
 import (
 	"context"
 	"errors"
-	"net"
 	"net/netip"
 	"strconv"
 	"sync"
 
 	"golang.zx2c4.com/wireguard/conn"
 
-	xnet "github.com/xtls/xray-core/common/net"
+	"github.com/xtls/xray-core/common/net"
 	"github.com/xtls/xray-core/features/dns"
 	"github.com/xtls/xray-core/transport/internet"
 )
@@ -51,21 +50,21 @@ func (n *netBind) ParseEndpoint(s string) (conn.Endpoint, error) {
 		return nil, err
 	}
 
-	addr := xnet.ParseAddress(ipStr)
-	if addr.Family() == xnet.AddressFamilyDomain {
+	addr := net.ParseAddress(ipStr)
+	if addr.Family() == net.AddressFamilyDomain {
 		ips, _, err := n.dns.LookupIP(addr.Domain(), n.dnsOption)
 		if err != nil {
 			return nil, err
 		} else if len(ips) == 0 {
 			return nil, dns.ErrEmptyResponse
 		}
-		addr = xnet.IPAddress(ips[0])
+		addr = net.IPAddress(ips[0])
 	}
 
-	dst := xnet.Destination{
+	dst := net.Destination{
 		Address: addr,
-		Port:    xnet.Port(portNum),
-		Network: xnet.Network_UDP,
+		Port:    net.Port(portNum),
+		Network: net.Network_UDP,
 	}
 
 	return &netEndpoint{
@@ -214,7 +213,7 @@ func (bind *netBindServer) Send(buff [][]byte, endpoint conn.Endpoint) error {
 }
 
 type netEndpoint struct {
-	dst  xnet.Destination
+	dst  net.Destination
 	conn net.Conn
 }
 
@@ -247,7 +246,7 @@ func (e netEndpoint) SrcToString() string {
 	return ""
 }
 
-func toNetIpAddr(addr xnet.Address) netip.Addr {
+func toNetIpAddr(addr net.Address) netip.Addr {
 	if addr.Family().IsIPv4() {
 		ip := addr.IP()
 		return netip.AddrFrom4([4]byte{ip[0], ip[1], ip[2], ip[3]})

proxy/wireguard/tun.go

@@ -3,7 +3,6 @@ package wireguard
 import (
 	"context"
 	"fmt"
-	"net"
 	"net/netip"
 	"runtime"
 	"strconv"
@@ -13,7 +12,7 @@ import (
 
 	"github.com/xtls/xray-core/common/errors"
 	"github.com/xtls/xray-core/common/log"
-	xnet "github.com/xtls/xray-core/common/net"
+	"github.com/xtls/xray-core/common/net"
 	"github.com/xtls/xray-core/proxy/wireguard/gvisortun"
 	"gvisor.dev/gvisor/pkg/tcpip"
 	"gvisor.dev/gvisor/pkg/tcpip/adapters/gonet"
@@ -28,7 +27,7 @@ import (
 
 type tunCreator func(localAddresses []netip.Addr, mtu int, handler promiscuousModeHandler) (Tunnel, error)
 
-type promiscuousModeHandler func(dest xnet.Destination, conn net.Conn)
+type promiscuousModeHandler func(dest net.Destination, conn net.Conn)
 
 type Tunnel interface {
 	BuildDevice(ipc string, bind conn.Bind) error
@@ -169,7 +168,7 @@ func createGVisorTun(localAddresses []netip.Addr, mtu int, handler promiscuousMo
 				ep.SocketOptions().SetKeepAlive(true)
 
 				// local address is actually destination
-				handler(xnet.TCPDestination(xnet.IPAddress(id.LocalAddress.AsSlice()), xnet.Port(id.LocalPort)), gonet.NewTCPConn(&wq, ep))
+				handler(net.TCPDestination(net.IPAddress(id.LocalAddress.AsSlice()), net.Port(id.LocalPort)), gonet.NewTCPConn(&wq, ep))
 			}(r)
 		})
 		stack.SetTransportProtocolHandler(tcp.ProtocolNumber, tcpForwarder.HandlePacket)
@@ -194,7 +193,7 @@ func createGVisorTun(localAddresses []netip.Addr, mtu int, handler promiscuousMo
 					Timeout: 15 * time.Second,
 				})
 
-				handler(xnet.UDPDestination(xnet.IPAddress(id.LocalAddress.AsSlice()), xnet.Port(id.LocalPort)), gonet.NewUDPConn(&wq, ep))
+				handler(net.UDPDestination(net.IPAddress(id.LocalAddress.AsSlice()), net.Port(id.LocalPort)), gonet.NewUDPConn(&wq, ep))
 			}(r)
 		})
 		stack.SetTransportProtocolHandler(udp.ProtocolNumber, udpForwarder.HandlePacket)

transport/internet/dialer.go

@@ -3,7 +3,6 @@ package internet
 import (
 	"context"
 	"fmt"
-	gonet "net"
 	"strings"
 
 	"github.com/xtls/xray-core/common"
@@ -183,7 +182,7 @@ func checkAddressPortStrategy(ctx context.Context, dest net.Destination, sockopt
 		if len(parts) != 3 {
 			return nil, errors.New("invalid address format", dest.Address.String())
 		}
-		_, srvRecords, err := gonet.DefaultResolver.LookupSRV(context.Background(), parts[0][1:], parts[1][1:], parts[2])
+		_, srvRecords, err := net.DefaultResolver.LookupSRV(context.Background(), parts[0][1:], parts[1][1:], parts[2])
 		if err != nil {
 			return nil, errors.New("failed to lookup SRV record").Base(err)
 		}
@@ -198,7 +197,7 @@ func checkAddressPortStrategy(ctx context.Context, dest net.Destination, sockopt
 	}
 	if OverrideBy == "txt" {
 		errors.LogDebug(ctx, "query TXT record for "+dest.Address.String())
-		txtRecords, err := gonet.DefaultResolver.LookupTXT(ctx, dest.Address.String())
+		txtRecords, err := net.DefaultResolver.LookupTXT(ctx, dest.Address.String())
 		if err != nil {
 			errors.LogError(ctx, "failed to lookup SRV record: "+err.Error())
 			return nil, errors.New("failed to lookup SRV record").Base(err)

transport/internet/grpc/dial.go

@@ -2,7 +2,6 @@ package grpc
 
 import (
 	"context"
-	gonet "net"
 	"sync"
 	"time"
 
@@ -99,7 +98,7 @@ func getGrpcClient(ctx context.Context, dest net.Destination, streamSettings *in
 			},
 			MinConnectTimeout: 5 * time.Second,
 		}),
-		grpc.WithContextDialer(func(gctx context.Context, s string) (gonet.Conn, error) {
+		grpc.WithContextDialer(func(gctx context.Context, s string) (net.Conn, error) {
 			select {
 			case <-gctx.Done():
 				return nil, gctx.Err()
@@ -180,7 +179,7 @@ func getGrpcClient(ctx context.Context, dest net.Destination, streamSettings *in
 	}
 
 	conn, err := grpc.Dial(
-		gonet.JoinHostPort(grpcDestHost, dest.Port.String()),
+		net.JoinHostPort(grpcDestHost, dest.Port.String()),
 		dialOptions...,
 	)
 	globalDialerMap[dialerConf{dest, streamSettings}] = conn

transport/internet/grpc/encoding/hunkconn.go

@@ -3,11 +3,10 @@ package encoding
 import (
 	"context"
 	"io"
-	"net"
 
 	"github.com/xtls/xray-core/common/buf"
 	"github.com/xtls/xray-core/common/errors"
-	xnet "github.com/xtls/xray-core/common/net"
+	"github.com/xtls/xray-core/common/net"
 	"github.com/xtls/xray-core/common/net/cnc"
 	"github.com/xtls/xray-core/common/signal/done"
 	"google.golang.org/grpc/metadata"
@@ -55,7 +54,7 @@ func NewHunkConn(hc HunkConn, cancel context.CancelFunc) net.Conn {
 	if ok {
 		header := md.Get("x-real-ip")
 		if len(header) > 0 {
-			realip := xnet.ParseAddress(header[0])
+			realip := net.ParseAddress(header[0])
 			if realip.Family().IsIP() {
 				rAddr = &net.TCPAddr{
 					IP:   realip.IP(),

transport/internet/sockopt_darwin.go

@@ -2,7 +2,6 @@ package internet
 
 import (
 	"context"
-	gonet "net"
 	"os"
 	"runtime"
 	"strconv"
@@ -135,7 +134,7 @@ func applyOutboundSocketOptions(network string, address string, fd uintptr, conf
 	}
 
 	if config.Interface != "" {
-		iface, err := gonet.InterfaceByName(config.Interface)
+		iface, err := net.InterfaceByName(config.Interface)
 
 		if err != nil {
 			return errors.New("failed to get interface ", config.Interface).Base(err)
@@ -226,7 +225,7 @@ func applyInboundSocketOptions(network string, fd uintptr, config *SocketConfig)
 	}
 
 	if config.Interface != "" {
-		iface, err := gonet.InterfaceByName(config.Interface)
+		iface, err := net.InterfaceByName(config.Interface)
 
 		if err != nil {
 			return errors.New("failed to get interface ", config.Interface).Base(err)

transport/internet/splithttp/browser_client.go

@@ -3,9 +3,9 @@ package splithttp
 import (
 	"context"
 	"io"
-	gonet "net"
 
 	"github.com/xtls/xray-core/common/errors"
+	"github.com/xtls/xray-core/common/net"
 	"github.com/xtls/xray-core/transport/internet/browser_dialer"
 	"github.com/xtls/xray-core/transport/internet/websocket"
 )
@@ -19,13 +19,13 @@ func (c *BrowserDialerClient) IsClosed() bool {
 	panic("not implemented yet")
 }
 
-func (c *BrowserDialerClient) OpenStream(ctx context.Context, url string, body io.Reader, uploadOnly bool) (io.ReadCloser, gonet.Addr, gonet.Addr, error) {
+func (c *BrowserDialerClient) OpenStream(ctx context.Context, url string, body io.Reader, uploadOnly bool) (io.ReadCloser, net.Addr, net.Addr, error) {
 	if body != nil {
 		return nil, nil, nil, errors.New("bidirectional streaming for browser dialer not implemented yet")
 	}
 
 	conn, err := browser_dialer.DialGet(url, c.transportConfig.GetRequestHeader(url))
-	dummyAddr := &gonet.IPAddr{}
+	dummyAddr := &net.IPAddr{}
 	if err != nil {
 		return nil, dummyAddr, dummyAddr, err
 	}

transport/internet/splithttp/client.go

@@ -5,7 +5,6 @@ import (
 	"context"
 	"fmt"
 	"io"
-	gonet "net"
 	"net/http"
 	"net/http/httptrace"
 	"sync"
@@ -42,7 +41,7 @@ func (c *DefaultDialerClient) IsClosed() bool {
 	return c.closed
 }
 
-func (c *DefaultDialerClient) OpenStream(ctx context.Context, url string, body io.Reader, uploadOnly bool) (wrc io.ReadCloser, remoteAddr, localAddr gonet.Addr, err error) {
+func (c *DefaultDialerClient) OpenStream(ctx context.Context, url string, body io.Reader, uploadOnly bool) (wrc io.ReadCloser, remoteAddr, localAddr net.Addr, err error) {
 	// this is done when the TCP/UDP connection to the server was established,
 	// and we can unblock the Dial function and print correct net addresses in
 	// logs

transport/internet/system_dialer.go

@@ -3,7 +3,6 @@ package internet
 import (
 	"context"
 	"math/rand"
-	gonet "net"
 	"syscall"
 	"time"
 
@@ -89,7 +88,7 @@ func (d *DefaultSystemDialer) Dial(ctx context.Context, src net.Address, dest ne
 		}, nil
 	}
 	// Chrome defaults
-	keepAliveConfig := gonet.KeepAliveConfig{
+	keepAliveConfig := net.KeepAliveConfig{
 		Enable:   true,
 		Idle:     45 * time.Second,
 		Interval: 45 * time.Second,

transport/internet/system_listener.go

@@ -2,7 +2,6 @@ package internet
 
 import (
 	"context"
-	gonet "net"
 	"os"
 	"runtime"
 	"strconv"
@@ -95,7 +94,7 @@ func (dl *DefaultListener) Listen(ctx context.Context, addr net.Addr, sockopt *S
 			if sockopt.TcpKeepAliveIdle*sockopt.TcpKeepAliveInterval < 0 {
 				return nil, errors.New("invalid TcpKeepAliveIdle or TcpKeepAliveInterval value: ", sockopt.TcpKeepAliveIdle, " ", sockopt.TcpKeepAliveInterval)
 			}
-			lc.KeepAliveConfig = gonet.KeepAliveConfig{
+			lc.KeepAliveConfig = net.KeepAliveConfig{
 				Enable:   false,
 				Idle:     -1,
 				Interval: -1,

transport/internet/websocket/dialer.go

@@ -5,7 +5,6 @@ import (
 	_ "embed"
 	"encoding/base64"
 	"io"
-	gonet "net"
 	"time"
 
 	"github.com/gorilla/websocket"
@@ -64,7 +63,7 @@ func dialWebSocket(ctx context.Context, dest net.Destination, streamSettings *in
 		tlsConfig := tConfig.GetTLSConfig(tls.WithDestination(dest), tls.WithNextProto("http/1.1"))
 		dialer.TLSClientConfig = tlsConfig
 		if fingerprint := tls.GetFingerprint(tConfig.Fingerprint); fingerprint != nil {
-			dialer.NetDialTLSContext = func(_ context.Context, _, addr string) (gonet.Conn, error) {
+			dialer.NetDialTLSContext = func(_ context.Context, _, addr string) (net.Conn, error) {
 				// Like the NetDial in the dialer
 				pconn, err := internet.DialSystem(ctx, dest, streamSettings.SocketSettings)
 				if err != nil {

transport/pipe/impl.go

@@ -3,7 +3,6 @@ package pipe
 import (
 	"errors"
 	"io"
-	"runtime"
 	"sync"
 	"time"
 
@@ -136,11 +135,10 @@ func (p *pipe) writeMultiBufferInternal(mb buf.MultiBuffer) error {
 
 	if p.data == nil {
 		p.data = mb
-		return nil
+	} else {
+		p.data, _ = buf.MergeMulti(p.data, mb)
 	}
-
-	p.data, _ = buf.MergeMulti(p.data, mb)
-	return errSlowDown
+	return nil
 }
 
 func (p *pipe) WriteMultiBuffer(mb buf.MultiBuffer) error {
@@ -155,30 +153,23 @@ func (p *pipe) WriteMultiBuffer(mb buf.MultiBuffer) error {
 			return nil
 		}
 
-		if err == errSlowDown {
-			p.readSignal.Signal()
-
-			// Yield current goroutine. Hopefully the reading counterpart can pick up the payload.
-			runtime.Gosched()
-			return nil
+		if err == errBufferFull {
+			if p.option.discardOverflow {
+				buf.ReleaseMulti(mb)
+				return nil
+			}
+			select {
+			case <-p.writeSignal.Wait():
+				continue
+			case <-p.done.Wait():
+				buf.ReleaseMulti(mb)
+				return io.ErrClosedPipe
+			}
 		}
 
-		if err == errBufferFull && p.option.discardOverflow {
-			buf.ReleaseMulti(mb)
-			return nil
-		}
-
-		if err != errBufferFull {
-			buf.ReleaseMulti(mb)
-			p.readSignal.Signal()
-			return err
-		}
-
-		select {
-		case <-p.writeSignal.Wait():
-		case <-p.done.Wait():
-			return io.ErrClosedPipe
-		}
+		buf.ReleaseMulti(mb)
+		p.readSignal.Signal()
+		return err
 	}
 }