golang笔记之struct转map性能比较

测试代码

 1package main
 2
 3import (
 4    "encoding/json"
 5    "reflect"
 6    "testing"
 7)
 8
 9type A struct {
10    A string   `json:"a"`
11    B string   `json:"b"`
12    C int      `json:"c"`
13    D int      `json:"d"`
14    E []string `json:"e"`
15    F []int    `json:"f"`
16}
17
18var a = &A{
19    "string",
20    "test",
21    15,
22    1024,
23    []string{"vvv", "ssss", "44444"},
24    []int{100, 4012},
25}
26
27func Struct2Map(value interface{}) map[string]interface{} {
28    v := reflect.ValueOf(value)
29    for v.Kind() == reflect.Ptr {
30        v = v.Elem()
31    }
32    t := v.Type()
33
34    res := make(map[string]interface{})
35    for i := 0; i < t.NumField(); i++ {
36        if tag := t.Field(i).Tag.Get("json"); tag != "" && tag != "-" {
37            res[tag] = v.Field(i).Interface()
38        }
39    }
40    return res
41}
42
43func Struct2MapByJson(value interface{}) map[string]interface{} {
44    bs, err := json.Marshal(value)
45    if err != nil {
46
47    }
48
49    res := make(map[string]interface{})
50    if err := json.Unmarshal(bs, &res); err != nil {
51
52    }
53    return res
54}
55
56func Benchmark_Json2Map(b *testing.B) {
57    for i := 0; i < b.N; i++ {
58        Struct2MapByJson(a)
59    }
60}
61
62func Benchmark_Reflect2Map(b *testing.B) {
63    for i := 0; i < b.N; i++ {
64        Struct2Map(a)
65    }
66}

测试结果

1└──╼ go test -test.bench=".*" .
2goos: darwin
3goarch: amd64
4pkg: maple-test1
5Benchmark_Json2Map-8          241076          4672 ns/op
6Benchmark_Reflect2Map-8      1000000          1005 ns/op
7PASS
8ok      maple-test1	2.971s