opt: improve http example

README.md

@@ -435,6 +435,7 @@ import (
 	"strconv"
 	"strings"
 	"time"
+	"unsafe"
 
 	"github.com/panjf2000/gnet"
 )
@@ -554,11 +555,15 @@ func appendResp(b []byte, status, head, body string) []byte {
 	return b
 }
 
+func b2s(b []byte) string {
+	return *(*string)(unsafe.Pointer(&b))
+}
+
 // parseReq is a very simple http request parser. This operation
 // waits for the entire payload to be buffered before returning a
 // valid request.
 func parseReq(data []byte, req *request) (leftover []byte, err error) {
-	sdata := string(data)
+	sdata := b2s(data)
 	var i, s int
 	var head string
 	var clen int

README_ZH.md

@@ -433,6 +433,7 @@ import (
 	"strconv"
 	"strings"
 	"time"
+	"unsafe"
 
 	"github.com/panjf2000/gnet"
 )
@@ -552,11 +553,15 @@ func appendResp(b []byte, status, head, body string) []byte {
 	return b
 }
 
+func b2s(b []byte) string {
+	return *(*string)(unsafe.Pointer(&b))
+}
+
 // parseReq is a very simple http request parser. This operation
 // waits for the entire payload to be buffered before returning a
 // valid request.
 func parseReq(data []byte, req *request) (leftover []byte, err error) {
-	sdata := string(data)
+	sdata := b2s(data)
 	var i, s int
 	var head string
 	var clen int

examples/http/http.go

@@ -12,6 +12,7 @@ import (
 	"strconv"
 	"strings"
 	"time"
+	"unsafe"
 
 	"github.com/panjf2000/gnet"
 )
@@ -131,11 +132,15 @@ func appendResp(b []byte, status, head, body string) []byte {
 	return b
 }
 
+func b2s(b []byte) string {
+	return *(*string)(unsafe.Pointer(&b))
+}
+
 // parseReq is a very simple http request parser. This operation
 // waits for the entire payload to be buffered before returning a
 // valid request.
 func parseReq(data []byte, req *request) (leftover []byte, err error) {
-	sdata := string(data)
+	sdata := b2s(data)
 	var i, s int
 	var head string
 	var clen int