update README

README.md

@@ -1,109 +1,80 @@
-# go
+# json iterator (jsoniter)
+
 faster than DOM, more usable than SAX/StAX
 
-# string
+for performance numbers, see https://github.com/json-iterator/go-benchmark
+
+# DOM style api
 
 ```
-func Benchmark_jsoniter_string(b *testing.B) {
-	for n := 0; n < b.N; n++ {
-		lexer := NewLexerWithArray([]byte(`"\ud83d\udc4a"`))
-		lexer.LexString()
+type StructOfTag struct {
+	field1 string `json:"field-1"`
+	field2 string `json:"-"`
+	field3 int `json:",string"`
+}
+
+func Test_reflect_struct_tag_field(t *testing.T) {
+	iter := ParseString(`{"field-1": "hello", "field2": "", "field3": "100"}`)
+	struct_ := StructOfTag{field2: "world"}
+	iter.Read(&struct_)
+	if struct_.field1 != "hello" {
+		fmt.Println(iter.Error)
+		t.Fatal(struct_.field1)
+	}
+	if struct_.field2 != "world" {
+		fmt.Println(iter.Error)
+		t.Fatal(struct_.field2)
+	}
+	if struct_.field3 != 100 {
+		fmt.Println(iter.Error)
+		t.Fatal(struct_.field3)
 	}
 }
 ```
 
-10000000	       140 ns/op
+# StAX style api
+
+Array
 
 ```
-func Benchmark_json_string(b *testing.B) {
-	for n := 0; n < b.N; n++ {
-		result := ""
-		json.Unmarshal([]byte(`"\ud83d\udc4a"`), &result)
-	}
-}
-````
-
-2000000	       710 ns/op (5x slower)
-
-# int
-
-```
-func Benchmark_jsoniter_int(b *testing.B) {
-	for n := 0; n < b.N; n++ {
-		lexer := NewLexerWithArray([]byte(`-100`))
-		lexer.LexInt64()
-	}
+iter := ParseString(`[1,2,3]`)
+for iter.ReadArray() {
+  iter.ReadUint64()
 }
 ```
 
-30000000	        60.1 ns/op
+Object
 
 ```
-func Benchmark_json_int(b *testing.B) {
-	for n := 0; n < b.N; n++ {
-		result := int64(0)
-		json.Unmarshal([]byte(`-100`), &result)
-	}
+type TestObj struct {
+    Field1 string
+    Field2 uint64
 }
 ```
 
-3000000	       505 ns/op (8x slower)
-
-# array
-
 ```
-func Benchmark_jsoniter_array(b *testing.B) {
-	for n := 0; n < b.N; n++ {
-		iter := ParseString(`[1,2,3]`)
-		for iter.ReadArray() {
-			iter.ReadUint64()
-		}
-	}
+iter := ParseString(`{"field1": "1", "field2": 2}`)
+obj := TestObj{}
+for field := iter.ReadObject(); field != ""; field = iter.ReadObject() {
+    switch field {
+    case "field1":
+        obj.Field1 = iter.ReadString()
+    case "field2":
+        obj.Field2 = iter.ReadUint64()
+    default:
+        iter.ReportError("bind object", "unexpected field")
+    }
 }
 ```
 
-10000000	       189 ns/op
+Skip
 
 ```
-func Benchmark_json_array(b *testing.B) {
-	for n := 0; n < b.N; n++ {
-		result := []interface{}{}
-		json.Unmarshal([]byte(`[1,2,3]`), &result)
-	}
+iter := ParseString(`[ {"a" : [{"b": "c"}], "d": 102 }, "b"]`)
+iter.ReadArray()
+iter.Skip()
+iter.ReadArray()
+if iter.ReadString() != "b" {
+    t.FailNow()
 }
 ```
-1000000	      1327 ns/op
-
-# object
-
-```
-func Benchmark_jsoniter_object(b *testing.B) {
-	for n := 0; n < b.N; n++ {
-		iter := ParseString(`{"field1": "1", "field2": 2}`)
-		obj := TestObj{}
-		for field := iter.ReadObject(); field != ""; field = iter.ReadObject() {
-			switch field {
-			case "field1":
-				obj.Field1 = iter.ReadString()
-			case "field2":
-				obj.Field2 = iter.ReadUint64()
-			default:
-				iter.ReportError("bind object", "unexpected field")
-			}
-		}
-	}
-}
-```
-
-5000000	       401 ns/op
-
-```
-func Benchmark_json_object(b *testing.B) {
-	for n := 0; n < b.N; n++ {
-		result := TestObj{}
-		json.Unmarshal([]byte(`{"field1": "1", "field2": 2}`), &result)
-	}
-}
-```
-
-1000000	      1318 ns/op