diff --git a/_example/http-prompt/main.go b/_example/http-prompt/main.go
index b372a35..ec28c64 100644
--- a/_example/http-prompt/main.go
+++ b/_example/http-prompt/main.go
@@ -163,7 +163,22 @@ func completer(in prompt.Document) []prompt.Suggest {
 	return prompt.FilterHasPrefix(suggestions, w, true)
 }
 
+func setLog() *os.File {
+	f, err := os.OpenFile("log", os.O_RDWR|os.O_CREATE|os.O_TRUNC, 0666)
+	if err != nil {
+		log.Fatalf("error opening file: %v", err)
+	}
+
+	log.SetFlags(log.LstdFlags | log.Lshortfile)
+	log.SetOutput(f)
+	return f
+}
+
 func main() {
+
+	f := setLog()
+	defer f.Close()
+
 	var baseURL = "http://localhost:8000/"
 	if len(os.Args) == 2 {
 		baseURL = os.Args[1]
diff --git a/go.sum b/go.sum
index 3c72526..9d8e2fa 100644
--- a/go.sum
+++ b/go.sum
@@ -1,41 +1,23 @@
-github.com/mattn/go-colorable v0.0.9 h1:UVL0vNpWh04HeJXV0KLcaT7r06gOH2l4OW6ddYRUIY4=
-github.com/mattn/go-colorable v0.0.9/go.mod h1:9vuHe8Xs5qXnSaW/c/ABM9alt+Vo+STaOChaDxuIBZU=
 github.com/mattn/go-colorable v0.1.4/go.mod h1:U0ppj6V5qS13XJ6of8GYAs25YV2eR4EVcfRqFIhoBtE=
 github.com/mattn/go-colorable v0.1.7 h1:bQGKb3vps/j0E9GfJQ03JyhRuxsvdAanXlT9BTw3mdw=
 github.com/mattn/go-colorable v0.1.7/go.mod h1:u6P/XSegPjTcexA+o6vUJrdnUu04hMope9wVRipJSqc=
-github.com/mattn/go-isatty v0.0.3 h1:ns/ykhmWi7G9O+8a448SecJU3nSMBXJfqQkl0upE1jI=
-github.com/mattn/go-isatty v0.0.3/go.mod h1:M+lRXTBqGeGNdLjl/ufCoiOlB5xdOkqRJdNxMWT7Zi4=
 github.com/mattn/go-isatty v0.0.8/go.mod h1:Iq45c/XA43vh69/j3iqttzPXn0bhXyGjM0Hdxcsrc5s=
 github.com/mattn/go-isatty v0.0.10/go.mod h1:qgIWMr58cqv1PHHyhnkY9lrL7etaEgOFcMEpPG5Rm84=
 github.com/mattn/go-isatty v0.0.12 h1:wuysRhFDzyxgEmMf5xjvJ2M9dZoWAXNNr5LSBS7uHXY=
 github.com/mattn/go-isatty v0.0.12/go.mod h1:cbi8OIDigv2wuxKPP5vlRcQ1OAZbq2CE4Kysco4FUpU=
-github.com/mattn/go-runewidth v0.0.3 h1:a+kO+98RDGEfo6asOGMmpodZq4FNtnGP54yps8BzLR4=
-github.com/mattn/go-runewidth v0.0.3/go.mod h1:LwmH8dsx7+W8Uxz3IHJYH5QSwggIsqBzpuz5H//U1FU=
 github.com/mattn/go-runewidth v0.0.6/go.mod h1:H031xJmbD/WCDINGzjvQ9THkh0rPKHF+m2gUSrubnMI=
 github.com/mattn/go-runewidth v0.0.9 h1:Lm995f3rfxdpd6TSmuVCHVb/QhupuXlYr8sCI/QdE+0=
 github.com/mattn/go-runewidth v0.0.9/go.mod h1:H031xJmbD/WCDINGzjvQ9THkh0rPKHF+m2gUSrubnMI=
-github.com/mattn/go-tty v0.0.0-20180219170247-931426f7535a h1:8TGB3DFRNl06DB1Q6zBX+I7FDoCUZY2fmMS9WGUIIpw=
-github.com/mattn/go-tty v0.0.0-20180219170247-931426f7535a/go.mod h1:XPvLUNfbS4fJH25nqRHfWLMa1ONC8Amw+mIA639KxkE=
 github.com/mattn/go-tty v0.0.3 h1:5OfyWorkyO7xP52Mq7tB36ajHDG5OHrmBGIS/DtakQI=
 github.com/mattn/go-tty v0.0.3/go.mod h1:ihxohKRERHTVzN+aSVRwACLCeqIoZAWpoICkkvrWyR0=
-github.com/pkg/term v0.0.0-20180423043932-cda20d4ac917 h1:BinR73QvQveJdQ8uYZK/8MOjLADpZbI2qs/2+5rnhzQ=
-github.com/pkg/term v0.0.0-20180423043932-cda20d4ac917/go.mod h1:eCbImbZ95eXtAUIbLAuAVnBnwf83mjf6QIVH8SHYwqQ=
-github.com/pkg/term v1.0.0 h1:raTSNJjic7X4n89hhPyLOsgRYczmr3MyezRierWCTa8=
-github.com/pkg/term v1.0.0/go.mod h1:6rk0zrj6TXf8MR5fdVFsZMeGM2lxe3tUFLNBRlwX+dk=
 github.com/pkg/term v1.1.0 h1:xIAAdCMh3QIAy+5FrE8Ad8XoDhEU4ufwbaSozViP9kk=
 github.com/pkg/term v1.1.0/go.mod h1:E25nymQcrSllhX42Ok8MRm1+hyBdHY0dCeiKZ9jpNGw=
 golang.org/x/sync v0.0.0-20190911185100-cd5d95a43a6e/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
-golang.org/x/sys v0.0.0-20180620133508-ad87a3a340fa h1:MUO6aP6ViFfqImh/3zU3O6QX3W2hFRzkkuCIQuUCOsM=
-golang.org/x/sys v0.0.0-20180620133508-ad87a3a340fa/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20190222072716-a9d3bda3a223/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20191008105621-543471e840be/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20191120155948-bd437916bb0e/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20200116001909-b77594299b42/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20200223170610-d5e6a3e2c0ae/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
-golang.org/x/sys v0.0.0-20200519105757-fe76b779f299 h1:DYfZAGf2WMFjMxbgTjaC+2HC7NkNAQs+6Q8b9WEB/F4=
-golang.org/x/sys v0.0.0-20200519105757-fe76b779f299/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20200909081042-eff7692f9009/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
-golang.org/x/sys v0.0.0-20200917073148-efd3b9a0ff20 h1:4X356008q5SA3YXu8PiRap39KFmy4Lf6sGlceJKZQsU=
-golang.org/x/sys v0.0.0-20200917073148-efd3b9a0ff20/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20200918174421-af09f7315aff h1:1CPUrky56AcgSpxz/KfgzQWzfG09u5YOL8MvPYBlrL8=
 golang.org/x/sys v0.0.0-20200918174421-af09f7315aff/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
diff --git a/input_posix.go b/input_posix.go
index f104303..1b981fb 100644
--- a/input_posix.go
+++ b/input_posix.go
@@ -20,9 +20,9 @@ type PosixParser struct {
 // Setup should be called before starting input
 func (t *PosixParser) Setup() error {
 	// Set NonBlocking mode because if syscall.Read block this goroutine, it cannot receive data from stopCh.
-	if err := syscall.SetNonblock(t.fd, true); err != nil {
-		return err
-	}
+	//if err := syscall.SetNonblock(t.fd, true); err != nil {
+	//	return err
+	//}
 	if err := term.SetRaw(t.fd); err != nil {
 		return err
 	}
diff --git a/prompt.go b/prompt.go
index 173cd51..6c3e8ba 100644
--- a/prompt.go
+++ b/prompt.go
@@ -3,7 +3,6 @@ package prompt
 import (
 	"bytes"
 	"os"
-	"time"
 
 	"github.com/c-bata/go-prompt/internal/debug"
 )
@@ -46,7 +45,7 @@ type Exec struct {
 func (p *Prompt) Run() {
 	p.skipTearDown = false
 	defer debug.Teardown()
-	debug.Log("start prompt")
+	debug.Log("Run start prompt")
 	p.setUp()
 	defer p.tearDown()
 
@@ -56,9 +55,8 @@ func (p *Prompt) Run() {
 
 	p.renderer.Render(p.buf, p.completion)
 
-	bufCh := make(chan []byte, 128)
-	stopReadBufCh := make(chan struct{})
-	go p.readBuffer(bufCh, stopReadBufCh)
+	bufCh := make(chan []byte)
+	go p.readBuffer(bufCh)
 
 	exitCh := make(chan int)
 	winSizeCh := make(chan *WinSize)
@@ -70,12 +68,9 @@ func (p *Prompt) Run() {
 		case b := <-bufCh:
 			if shouldExit, e := p.feed(b); shouldExit {
 				p.renderer.BreakLine(p.buf)
-				stopReadBufCh <- struct{}{}
 				stopHandleSignalCh <- struct{}{}
 				return
 			} else if e != nil {
-				// Stop goroutine to run readBuffer function
-				stopReadBufCh <- struct{}{}
 				stopHandleSignalCh <- struct{}{}
 
 				// Unset raw mode
@@ -93,7 +88,6 @@ func (p *Prompt) Run() {
 				}
 				// Set raw mode
 				debug.AssertNoError(p.in.Setup())
-				go p.readBuffer(bufCh, stopReadBufCh)
 				go p.handleSignals(exitCh, winSizeCh, stopHandleSignalCh)
 			} else {
 				p.completion.Update(*p.buf.Document())
@@ -106,8 +100,6 @@ func (p *Prompt) Run() {
 			p.renderer.BreakLine(p.buf)
 			p.tearDown()
 			os.Exit(code)
-		default:
-			time.Sleep(10 * time.Millisecond)
 		}
 	}
 }
@@ -150,6 +142,7 @@ func (p *Prompt) feed(b []byte) (shouldExit bool, exec *Exec) {
 			shouldExit = true
 			return
 		}
+
 	case NotDefined:
 		if p.handleASCIICodeBinding(b) {
 			return
@@ -232,7 +225,7 @@ func (p *Prompt) handleASCIICodeBinding(b []byte) bool {
 // Input just returns user input text.
 func (p *Prompt) Input() string {
 	defer debug.Teardown()
-	debug.Log("start prompt")
+	debug.Log("Input start prompt")
 	p.setUp()
 	defer p.tearDown()
 
@@ -241,44 +234,33 @@ func (p *Prompt) Input() string {
 	}
 
 	p.renderer.Render(p.buf, p.completion)
-	bufCh := make(chan []byte, 128)
-	stopReadBufCh := make(chan struct{})
-	go p.readBuffer(bufCh, stopReadBufCh)
+	bufCh := make(chan []byte)
+	go p.readBuffer(bufCh)
 
 	for {
 		select {
 		case b := <-bufCh:
 			if shouldExit, e := p.feed(b); shouldExit {
 				p.renderer.BreakLine(p.buf)
-				stopReadBufCh <- struct{}{}
 				return ""
 			} else if e != nil {
-				// Stop goroutine to run readBuffer function
-				stopReadBufCh <- struct{}{}
 				return e.input
 			} else {
 				p.completion.Update(*p.buf.Document())
 				p.renderer.Render(p.buf, p.completion)
 			}
-		default:
-			time.Sleep(10 * time.Millisecond)
 		}
 	}
 }
 
-func (p *Prompt) readBuffer(bufCh chan []byte, stopCh chan struct{}) {
+func (p *Prompt) readBuffer(bufCh chan []byte) {
 	debug.Log("start reading buffer")
+
+	// blocking read from tty, this groutine will not exit until os.Exit()
 	for {
-		select {
-		case <-stopCh:
-			debug.Log("stop reading buffer")
-			return
-		default:
-			if b, err := p.in.Read(); err == nil && !(len(b) == 1 && b[0] == 0) {
-				bufCh <- b
-			}
+		if b, err := p.in.Read(); err == nil && !(len(b) == 1 && b[0] == 0) {
+			bufCh <- b // blocking send
 		}
-		time.Sleep(10 * time.Millisecond)
 	}
 }