1. fasthttp
- Import导入:go get github.com/valyala/fasthttp
 - Github地址: https://github.com/valyala/fasthttp
 - 说明:高性能HTTP服务框架
 
示例
// net/http code
m := &http.ServeMux{}
m.HandleFunc("/foo", fooHandlerFunc)
m.HandleFunc("/bar", barHandlerFunc)
m.Handle("/baz", bazHandler)
http.ListenAndServe(":80", m)
// the corresponding fasthttp code
m := func(ctx *fasthttp.RequestCtx) {
    switch string(ctx.Path()) {
    case "/foo":
        fooHandlerFunc(ctx)
    case "/bar":
        barHandlerFunc(ctx)
    case "/baz":
        bazHandler.HandlerFunc(ctx)
    default:
        ctx.Error("not found", fasthttp.StatusNotFound)
    }
}
fasthttp.ListenAndServe(":80", m)
2. concurrent map
正如 这里 和 这里所描述的, Go语言原生的map类型并不支持并发读写。concurrent-map提供了一种高性能的解决方案:通过对内部map进行分片,降低锁粒度,从而达到最少的锁等待时间(锁冲突)
在Go 1.9之前,go语言标准库中并没有实现并发map。在Go 1.9中,引入了sync.Map。新的sync.Map与此concurrent-map有几个关键区别。标准库中的sync.Map是专为append-only场景设计的。因此,如果您想将Map用于一个类似内存数据库,那么使用我们的版本可能会受益。你可以在golang repo上读到更多,这里 and 这里
***译注:`sync.Map`在读多写少性能比较好,否则并发性能很差***
- Import导入:go get github.com/orcaman/concurrent-map
 - Github地址: https://github.com/orcaman/concurrent-map/tree/v1.0.0
 - 说明:分片带锁Map,比sync.Map性能高
 
示例
    // 创建一个新的 map.
    m := cmap.New()
    // 设置变量m一个键为“foo”值为“bar”键值对
    m.Set("foo", "bar")
    // 从m中获取指定键值.
    if tmp, ok := m.Get("foo"); ok {
        bar := tmp.(string)
    }
    // 删除键为“foo”的项
    m.Remove("foo")
3. lockfree
- Import导入:go get github.com/bruceshao/lockfree
 - Github地址: https://github.com/bruceshao/lockfree
 - 说明:高性能无锁队列
 
性能对比
整体上来看,Disruptor(lockfree)在写入和读取上的性能大概都在channel的7倍以上,数据写入的越多,性能提升越明显。 下面是buffer=1024*1024时,写入数据的耗时对比:

4. GoDS (Go Data Structures)
- Import导入:go get github.com/emirpasic/gods/…
 - Github地址: https://github.com/emirpasic/gods
 - 说明:对象方式的链表、队列、各种树等多种数据结构
 
支持数据结构列表
| Data | Structure | Ordered | Iterator | Enumerable | Referenced by | 
|---|---|---|---|---|---|
| Lists | |||||
| ArrayList | yes | yes* | yes | index | |
| SinglyLinkedList | yes | yes | yes | index | |
| DoublyLinkedList | yes | yes* | yes | index | |
| Sets | |||||
| HashSet | no | no | no | index | |
| TreeSet | yes | yes* | yes | index | |
| LinkedHashSet | yes | yes* | yes | index | |
| Stacks | |||||
| LinkedListStack | yes | yes | no | index | |
| ArrayStack | yes | yes* | no | index | |
| Maps | |||||
| HashMap | no | no | no | key | |
| TreeMap | yes | yes* | yes | key | |
| LinkedHashMap | yes | yes* | yes | key | |
| HashBidiMap | no | no | no | key* | |
| TreeBidiMap | yes | yes* | yes | key* | |
| Trees | |||||
| RedBlackTree | yes | yes* | no | key | |
| AVLTree | yes | yes* | no | key | |
| BTree | yes | yes* | no | key | |
| BinaryHeap | yes | yes* | no | index | |
| Queues | |||||
| LinkedListQueue | yes | yes | no | index | |
| ArrayQueue | yes | yes* | no | index | |
| CircularBuffer | yes | yes* | no | index | |
| PriorityQueue | yes | yes* | no | index | |
| *reversible | *bidirectional | 
5. Gin Web Framework
Gin是一个用Go编写的web框架。由于httprouter,它具有类似马提尼的API,性能提高了40倍。如果你需要高性能和高生产力,你会喜欢Gin。
- Import导入:go get github.com/gin-Gonic/gin
 - Github地址: https://github.com/gin-Gonic/gin
 - 说明:高性能的web 框架
 
示例
package main
import (
  "net/http"
  "github.com/gin-gonic/gin"
)
func main() {
  r := gin.Default()
  r.GET("/ping", func(c *gin.Context) {
    c.JSON(http.StatusOK, gin.H{
      "message": "pong",
    })
  })
  r.Run() // listen and serve on 0.0.0.0:8080 (for windows "localhost:8080")
}
6. cron 定时器
- Import导入:go get github.com/robfig/cron
 - Github地址: https://github.com/robfig/cron
 - 说明:支持多种多样的灵活的定时器,有着丰富完善的定时器表达式
 
示例
c := cron.New()
c.AddFunc("0 30 * * * *", func() { fmt.Println("Every hour on the half hour") })
c.AddFunc("@hourly",      func() { fmt.Println("Every hour") })
c.AddFunc("@every 1h30m", func() { fmt.Println("Every hour thirty") })
c.Start()
..
// Funcs are invoked in their own goroutine, asynchronously.
...
// Funcs may also be added to a running Cron
c.AddFunc("@daily", func() { fmt.Println("Every day") })
..
// Inspect the cron job entries' next and previous run times.
inspect(c.Entries())
..
c.Stop()  // Stop the scheduler (does not stop any jobs already running).
7. golang-set
- Import导入:go get github.com/deckarep/golang-set
 - Github地址: https://github.com/deckarep/Golang-set
 - 说明:包含线程安全和非线程安全的高性能集合
 
示例
// Syntax example, doesn't compile.
mySet := mapset.NewSet[T]() // where T is some concrete comparable type.
// Therefore this code creates an int set
mySet := mapset.NewSet[int]()
// Or perhaps you want a string set
mySet := mapset.NewSet[string]()
type myStruct {
  name string
  age uint8
}
// Alternatively a set of structs
mySet := mapset.NewSet[myStruct]()
// Lastly a set that can hold anything using the any or empty interface keyword: interface{}. This is effectively removes type safety.
mySet := mapset.NewSet[any]()
package main
import (
  "fmt"
  mapset "github.com/deckarep/golang-set/v2"
)
func main() {
  // Create a string-based set of required classes.
  required := mapset.NewSet[string]()
  required.Add("cooking")
  required.Add("english")
  required.Add("math")
  required.Add("biology")
  // Create a string-based set of science classes.
  sciences := mapset.NewSet[string]()
  sciences.Add("biology")
  sciences.Add("chemistry")
  
  // Create a string-based set of electives.
  electives := mapset.NewSet[string]()
  electives.Add("welding")
  electives.Add("music")
  electives.Add("automotive")
  // Create a string-based set of bonus programming classes.
  bonus := mapset.NewSet[string]()
  bonus.Add("beginner go")
  bonus.Add("python for dummies")
}
8. Bloom filters 布隆过滤器
Bloom过滤器是集合的简洁/压缩表示,其中主要要求是进行成员查询;即项目是否是集合的成员。当元素确实存在时,Bloom过滤器将始终正确地报告集合中元素的存在。Bloom过滤器可以使用比原始集合少得多的存储空间,但它允许一些“误报”:它有时可能会报告某个元素在集合中,而不是在集合中。
当你构建时,你需要知道你有多少元素(期望的容量),以及你愿意容忍的期望假阳性率是多少。常见的假阳性率为1%。假阳性率越低,需要的内存就越多。同样,容量越高,使用的内存就越多。您可以按照以下方式构造Bloom过滤器,该过滤器能够接收100万个元素,误报率为1%。
- Import导入:go get github.com/bits-and-blooms/bloom
 - Github地址: https://github.com/bits-and-blooms/bloom
 - 说明:Go版本的布隆过滤器
 
示例
    filter := bloom.NewWithEstimates(1000000, 0.01) 
    
    // to add a string item, "Love"
    filter.Add([]byte("Love"))
    
    // Similarly, to test if "Love" is in bloom:
    if filter.Test([]byte("Love"))
    
    // to add a uint32 to the filter
    i := uint32(100)
    n1 := make([]byte, 4)
    binary.BigEndian.PutUint32(n1, i)
    filter.Add(n1)
9. GCache
golang的缓存库。它支持可擦除缓存、LFU、LRU和ARC。
- Import导入:go get github.com/bluele/gcache
 - Github地址: https://github.com/bluele/gcache
 - 说明:Go语言的缓存库,支持LRU、LFU和ARC算法
 
特性
- 支持可擦除缓存、LFU、LRU和ARC
 - 协程安全
 - 支持驱逐、清除和添加条目的事件处理程序 (可选)
 - 缓存不存在的时候自动加载缓存 (可选)
 
示例
package main
import (
  "github.com/bluele/gcache"
  "fmt"
)
func main() {
  gc := gcache.New(20).
    LRU().
    Build()
  gc.Set("key", "ok")
  value, err := gc.Get("key")
  if err != nil {
    panic(err)
  }
  fmt.Println("Get:", value)
}
10. ledis(go版本的redis)
Ledisdb是一个用Go编写的高性能NoSQL数据库库和服务器。它类似于Redis,但将数据存储在磁盘中。它支持许多数据结构,包括kv、list、hash、zset、set。
LedisDB现在支持多个不同的数据库作为后端。
- Import导入:go get github.com/ledisdb/ledisdb/ledis
 - Github地址: https://github.com/ledisdb/ledisdb
 - 说明:Go语言版本的redis
 
示例
import (
    lediscfg "github.com/ledisdb/ledisdb/config"
    "github.com/ledisdb/ledisdb/ledis"
)
// Use Ledis's default config
cfg := lediscfg.NewConfigDefault()
l, _ := ledis.Open(cfg)
db, _ := l.Select(0)
db.Set(key, value)
db.Get(key)
11. uuid生成器
uuid包基于RFC 4122和DCE 1.1:身份验证和安全服务生成和检查uuid。
此包基于 github.com/pboman/uuid包(以前名为code.google.com/p/go-uuid)。它与这些早期包的不同之处在于uuid是一个16字节数组,而不是一个字节片。此更改导致的一个损失是表示无效UUID(与NIL UUID相比)的能力。
- Import导入:go get github.com/google/uuid
 - Github地址: https://github.com/google/uuid
 - 说明:生成uuid
 
示例
package uuid
import (
    "fmt"
    "testing"
    "github.com/google/uuid"
)
func TestUuid(t *testing.T) {
    for i := 0; i <= 10; i++ {
        uuid, _ := uuid.NewUUID()
        fmt.Println(uuid)
    }
}
结果
=== RUN   TestUuid
709096ca-bcb5-11ed-b598-acde48001122
70909d5a-bcb5-11ed-b598-acde48001122
70909d6e-bcb5-11ed-b598-acde48001122
70909d78-bcb5-11ed-b598-acde48001122
70909d8c-bcb5-11ed-b598-acde48001122
70909d96-bcb5-11ed-b598-acde48001122
70909da0-bcb5-11ed-b598-acde48001122
70909db4-bcb5-11ed-b598-acde48001122
70909dbe-bcb5-11ed-b598-acde48001122
70909dc8-bcb5-11ed-b598-acde48001122
70909dd2-bcb5-11ed-b598-acde48001122
--- PASS: TestUuid (0.00s)
PASS
12. Redigo
Redigo是Redis数据库的Go客户端。
- Import导入:go get github.com/gomodule/redigo
 - Github地址: https://github.com/gomodule/redigo
 - 说明:Redis数据库的客户端
 
示例
package main
import (
    "os"
    "github.com/gomodule/redigo/redis"
)
func main() {
    c, err := redis.DialURL(os.Getenv("REDIS_URL"))
    if err != nil {
        // handle connection error
    }
    defer c.Close()
} 
13. gRPC-Go
- Import导入:go get -u google.golang.org/grpc
 - Github地址: https://github.com/grpc/grpc-Go
 - 说明:go语言实现的grpc
 
示例
Follow these setup to run the quick start example:
- 
Get the code:
$ go get google.golang.org/grpc/examples/helloworld/greeter_client $ go get google.golang.org/grpc/examples/helloworld/greeter_server - 
Run the server:
$ $(go env GOPATH)/bin/greeter_server & - 
Run the client:
$ $(go env GOPATH)/bin/greeter_client Greeting: Hello world 
14. Viper配置解析

Viper需要最少的配置,因此它知道在哪里查找配置文件。Viper支持JSON、TOML、YAML、HCL、INI、envfile和Java财产文件。Viper可以搜索多个路径,但目前单个Viper实例仅支持单个配置文件。Viper不默认任何配置搜索路径,将默认决策留给应用程序。
- Import导入:go get github.com/spf13/viper
 - Github地址: https://github.com/spf13/viper
 - 说明:配置文件解析库,功能及其强大
 
示例
viper.SetConfigName("config") // name of config file (without extension)
viper.SetConfigType("yaml") // REQUIRED if the config file does not have the extension in the name
viper.AddConfigPath("/etc/appname/")   // path to look for the config file in
viper.AddConfigPath("$HOME/.appname")  // call multiple times to add many search paths
viper.AddConfigPath(".")               // optionally look for config in the working directory
err := viper.ReadInConfig() // Find and read the config file
if err != nil { // Handle errors reading the config file
    panic(fmt.Errorf("fatal error config file: %w", err))
}
15. TPC并发服务器框架
Based on Golang Lightweight TCP Concurrent server framework(基于Golang轻量级TCP并发服务器框架).
- Import导入:go get github.com/aceld/zinx
 - Github地址: https://github.com/aceld/zinx
 - 说明:TCP并发服务器框架
 
快速启动
# clone from git
$ git clone https://github.com/aceld/zinx.git
# cd the dir of Demo
$ cd ./zinx/examples/zinx_server
# Build
$ make build
# Build for docker image
$ make image
# start and run
$ make run 
# cd the dir of Demo Client
$ cd ../zinx_client
# run 
$ go run main.go 
服务端
func main() {
    //1 Create the server object
    s := znet.NewServer()
    //2 Configure user-defined routes and services
    s.AddRouter(0, &PingRouter{})
    //3 Start the service
    s.Serve()
}
16. 时间工具
- Import导入:go get github.com/jinzhu/now
 - Github地址: https://github.com/jinzhu/now
 - 说明:Go语言的时间工具集,各种时间的获取、转换等等
 
示例
import "github.com/jinzhu/now"
time.Now() // 2013-11-18 17:51:49.123456789 Mon
now.BeginningOfMinute()        // 2013-11-18 17:51:00 Mon
now.BeginningOfHour()          // 2013-11-18 17:00:00 Mon
now.BeginningOfDay()           // 2013-11-18 00:00:00 Mon
now.BeginningOfWeek()          // 2013-11-17 00:00:00 Sun
now.BeginningOfMonth()         // 2013-11-01 00:00:00 Fri
now.BeginningOfQuarter()       // 2013-10-01 00:00:00 Tue
now.BeginningOfYear()          // 2013-01-01 00:00:00 Tue
now.EndOfMinute()              // 2013-11-18 17:51:59.999999999 Mon
now.EndOfHour()                // 2013-11-18 17:59:59.999999999 Mon
now.EndOfDay()                 // 2013-11-18 23:59:59.999999999 Mon
now.EndOfWeek()                // 2013-11-23 23:59:59.999999999 Sat
now.EndOfMonth()               // 2013-11-30 23:59:59.999999999 Sat
now.EndOfQuarter()             // 2013-12-31 23:59:59.999999999 Tue
now.EndOfYear()                // 2013-12-31 23:59:59.999999999 Tue
now.WeekStartDay = time.Monday // Set Monday as first day, default is Sunday
now.EndOfWeek()                // 2013-11-24 23:59:59.999999999 Sun
location, err := time.LoadLocation("Asia/Shanghai")
myConfig := &now.Config{
	WeekStartDay: time.Monday,
	TimeLocation: location,
	TimeFormats: []string{"2006-01-02 15:04:05"},
}
t := time.Date(2013, 11, 18, 17, 51, 49, 123456789, time.Now().Location()) // // 2013-11-18 17:51:49.123456789 Mon
myConfig.With(t).BeginningOfWeek()         // 2013-11-18 00:00:00 Mon
myConfig.Parse("2002-10-12 22:14:01")     // 2002-10-12 22:14:01
myConfig.Parse("2002-10-12 22:14")        // returns error 'can't parse string as time: 2002-10-12 22:14'
17. json-iterator
高性能100%兼容的替换“encoding/json”
- Import导入:go get github.com/json-iterator/go
 - Github地址: https://github.com/json-iterator/go
 - 说明:100%兼容encoding/json的更高效的json解析库
 
| ns/op | allocation bytes | allocation times | |
|---|---|---|---|
| std decode | 35510 ns/op | 1960 B/op | 99 allocs/op | 
| easyjson decode | 8499 ns/op | 160 B/op | 4 allocs/op | 
| jsoniter decode | 5623 ns/op | 160 B/op | 3 allocs/op | 
| std encode | 2213 ns/op | 712 B/op | 5 allocs/op | 
| easyjson encode | 883 ns/op | 576 B/op | 3 allocs/op | 
| jsoniter encode | 837 ns/op | 384 B/op | 4 allocs/op | 
示例
100% 与标准lib的兼容性
Replace
import "encoding/json"
json.Marshal(&data)
with
import jsoniter "github.com/json-iterator/go"
var json = jsoniter.ConfigCompatibleWithStandardLibrary
json.Marshal(&data)
Replace
import "encoding/json"
json.Unmarshal(input, &data)
with
import jsoniter "github.com/json-iterator/go"
var json = jsoniter.ConfigCompatibleWithStandardLibrary
json.Unmarshal(input, &data)
18. zap 日志
基于Golang实现的 高性能,结构化,分等级的日志库
- Import导入:go get -u go.uber.org/zap
 - Github地址: https://github.com/uber-go/zap
 - 说明:功能强大的日志输出库
 
示例
logger, _ := zap.NewProduction()
defer logger.Sync()
logger.Info("failed to fetch URL",
  // Structured context as strongly typed Field values.
  zap.String("url", url),
  zap.Int("attempt", 3),
  zap.Duration("backoff", time.Second),
)
19. color 打印输出

- Import导入:go get github.com/fatih/color
 - Github地址: https://github.com/fatih/color
 - 说明:打印输出带有自定义颜色的日志
 
示例
// Print with default helper functions
color.Cyan("Prints text in cyan.")
// A newline will be appended automatically
color.Blue("Prints %s in blue.", "text")
// These are using the default foreground colors
color.Red("We have red")
color.Magenta("And many others ..")
                      
                      
                    
          
          


            
            
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