From 449fd49fd393860a4183e04244621dace920d655 Mon Sep 17 00:00:00 2001
From: wdvxdr <wdvxdr@foxmail.com>
Date: Tue, 2 Feb 2021 13:21:28 +0800
Subject: [PATCH] =?UTF-8?q?:zap:speed=20up=20jce=20writer=20again=20Benchm?=
 =?UTF-8?q?arkJceWriter=5FWriteJceStructRaw=20BenchmarkJceWriter=5FWriteJc?=
 =?UTF-8?q?eStructRaw-8=20=20=20=20=09=20=20414883=09=20=20=20=20=20=20265?=
 =?UTF-8?q?9=20ns/op=20BenchmarkJceWriter=5FWriteJceStructRaw2=20Benchmark?=
 =?UTF-8?q?JceWriter=5FWriteJceStructRaw2-8=20=20=20=09=20=20925503=09=20?=
 =?UTF-8?q?=20=20=20=20=201460=20ns/op=20=E5=8F=88=E5=BF=AB=E4=BA=861?=
 =?UTF-8?q?=E5=80=8D?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 binary/jce/writer.go | 21 ++++++++++++---------
 1 file changed, 12 insertions(+), 9 deletions(-)

diff --git a/binary/jce/writer.go b/binary/jce/writer.go
index 6c178603..21a1b4bf 100644
--- a/binary/jce/writer.go
+++ b/binary/jce/writer.go
@@ -7,6 +7,7 @@ import (
 	"reflect"
 	"strconv"
 	"sync"
+	"unsafe"
 )
 
 type JceWriter struct {
@@ -203,8 +204,9 @@ func (w *JceWriter) WriteObject(i interface{}, tag int) {
 }
 
 type decoder []struct {
-	fieldID int
-	id      int
+	ty     reflect2.Type
+	offset uintptr
+	id     int
 }
 
 var decoderCache = sync.Map{}
@@ -212,7 +214,6 @@ var decoderCache = sync.Map{}
 // WriteJceStructRaw 写入 Jce 结构体
 func (w *JceWriter) WriteJceStructRaw(s IJceStruct) {
 	var (
-		v      = reflect.ValueOf(s).Elem()
 		ty2    = reflect2.TypeOf(s)
 		jceDec decoder
 	)
@@ -221,9 +222,10 @@ func (w *JceWriter) WriteJceStructRaw(s IJceStruct) {
 		jceDec = dec.(decoder)
 	} else { // 初次反射
 		jceDec = decoder{}
-		t := reflect.TypeOf(s).Elem()
+		t := reflect2.TypeOf(s).(reflect2.PtrType).Elem().(reflect2.StructType)
 		for i := 0; i < t.NumField(); i++ {
-			strId := t.Field(i).Tag.Get("jceId")
+			field := t.Field(i)
+			strId := field.Tag().Get("jceId")
 			if strId == "" {
 				continue
 			}
@@ -232,14 +234,15 @@ func (w *JceWriter) WriteJceStructRaw(s IJceStruct) {
 				continue
 			}
 			jceDec = append(jceDec, struct {
-				fieldID int
-				id      int
-			}{fieldID: i, id: id})
+				ty     reflect2.Type
+				offset uintptr
+				id     int
+			}{ty: field.Type(), offset: field.Offset(), id: id})
 		}
 		decoderCache.Store(ty2, jceDec) // 存入缓存
 	}
 	for _, dec := range jceDec {
-		obj := v.Field(dec.fieldID).Interface()
+		var obj = dec.ty.UnsafeIndirect(unsafe.Pointer(uintptr(reflect2.PtrOf(s)) + dec.offset)) // MAGIC!
 		if obj != nil {
 			w.WriteObject(obj, dec.id)
 		}