Created
July 30, 2020 06:23
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passing a pointer will always be faster than value, isn't it?
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package main | |
import ( | |
"encoding/json" | |
"testing" | |
) | |
type foo struct { | |
ID string `json:"_id"` | |
Index int `json:"index"` | |
GUID string `json:"guid"` | |
IsActive bool `json:"isActive"` | |
Balance string `json:"balance"` | |
Picture string `json:"picture"` | |
Age int `json:"age"` | |
EyeColor string `json:"eyeColor"` | |
Name string `json:"name"` | |
Gender string `json:"gender"` | |
Company string `json:"company"` | |
Email string `json:"email"` | |
Phone string `json:"phone"` | |
Address string `json:"address"` | |
About string `json:"about"` | |
Registered string `json:"registered"` | |
Latitude float64 `json:"latitude"` | |
Longitude float64 `json:"longitude"` | |
Greeting string `json:"greeting"` | |
FavoriteFruit string `json:"favoriteFruit"` | |
} | |
type bar struct { | |
ID string | |
Index int | |
GUID string | |
IsActive bool | |
Balance string | |
Picture string | |
Age int | |
EyeColor string | |
Name string | |
Gender string | |
Company string | |
Email string | |
Phone string | |
Address string | |
About string | |
Registered string | |
Latitude float64 | |
Longitude float64 | |
Greeting string | |
FavoriteFruit string | |
} | |
var input foo | |
func init() { | |
err := json.Unmarshal([]byte(`{ | |
"_id": "5d2f4fcf76c35513af00d47e", | |
"index": 1, | |
"guid": "ed687a14-590b-4d81-b0cb-ddaa857874ee", | |
"isActive": true, | |
"balance": "$3,837.19", | |
"picture": "http://placehold.it/32x32", | |
"age": 28, | |
"eyeColor": "green", | |
"name": "Rochelle Espinoza", | |
"gender": "female", | |
"company": "PARLEYNET", | |
"email": "rochelleespinoza@parleynet.com", | |
"phone": "+1 (969) 445-3766", | |
"address": "956 Little Street, Jugtown, District Of Columbia, 6396", | |
"about": "Excepteur exercitation labore ut cupidatat laboris mollit ad qui minim aliquip nostrud anim adipisicing est. Nisi sunt duis occaecat aliquip est irure Lorem irure nulla tempor sit sunt. Eiusmod laboris ex est velit minim ut cillum sunt laborum labore ad sunt.\r\n", | |
"registered": "2016-03-20T12:07:25 -00:00", | |
"latitude": 61.471517, | |
"longitude": 54.01596, | |
"greeting": "Hello, Rochelle Espinoza!You have 9 unread messages.", | |
"favoriteFruit": "banana" | |
}`), &input) | |
if err != nil { | |
panic(err) | |
} | |
} | |
func byPointer(in *foo) *bar { | |
return &bar{ | |
ID: in.ID, | |
Address: in.Address, | |
Email: in.Email, | |
Index: in.Index, | |
Name: in.Name, | |
About: in.About, | |
Age: in.Age, | |
Balance: in.Balance, | |
Company: in.Company, | |
EyeColor: in.EyeColor, | |
FavoriteFruit: in.FavoriteFruit, | |
Gender: in.Gender, | |
Greeting: in.Greeting, | |
GUID: in.GUID, | |
IsActive: in.IsActive, | |
Latitude: in.Latitude, | |
Longitude: in.Longitude, | |
Phone: in.Phone, | |
Picture: in.Picture, | |
Registered: in.Registered, | |
} | |
} | |
func byValue(in foo) bar { | |
return bar{ | |
ID: in.ID, | |
Address: in.Address, | |
Email: in.Email, | |
Index: in.Index, | |
Name: in.Name, | |
About: in.About, | |
Age: in.Age, | |
Balance: in.Balance, | |
Company: in.Company, | |
EyeColor: in.EyeColor, | |
FavoriteFruit: in.FavoriteFruit, | |
Gender: in.Gender, | |
Greeting: in.Greeting, | |
GUID: in.GUID, | |
IsActive: in.IsActive, | |
Latitude: in.Latitude, | |
Longitude: in.Longitude, | |
Phone: in.Phone, | |
Picture: in.Picture, | |
Registered: in.Registered, | |
} | |
} | |
var pointerResult *bar | |
func BenchmarkByPointer(b *testing.B) { | |
var r *bar | |
b.ResetTimer() | |
for i := 0; i < b.N; i++ { | |
r = byPointer(&input) | |
} | |
pointerResult = r | |
} | |
var valueResult bar | |
func BenchmarkByValue(b *testing.B) { | |
var r bar | |
b.ResetTimer() | |
for i := 0; i < b.N; i++ { | |
r = byValue(input) | |
} | |
valueResult = r | |
} |
Author
colynn
commented
Jul 30, 2020
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