goroutine 池工具已经有好多了，好多都会基于channel或者cas 进行开发设计
谷歌的errgroup以及machine 都是一个不错的选择，Jeffail/tunny 也是一个比较稳定
的包
参考使用
- main.go
package main
import (
"io/ioutil"
"net/http"
"runtime"
"github.com/Jeffail/tunny"
)
func main() {
numCPUs := runtime.NumCPU()
pool := tunny.NewFunc(numCPUs, func(payload interface{}) interface{} {
return payload
})
defer pool.Close()
http.HandleFunc("/work", func(w http.ResponseWriter, r *http.Request) {
input, err := ioutil.ReadAll(r.Body)
if err != nil {
http.Error(w, "Internal error", http.StatusInternalServerError)
}
defer r.Body.Close()
// Funnel this work into our pool. This call is synchronous and will
// block until the job is completed.
result := pool.Process(input)
w.Write(result.([]byte))
})
http.ListenAndServe(":8080", nil)
}
说明
tunny同时还支持其他的特性，比如超时，也支持进行状态的处理，同时machine 是一个很不错的选择，支持的特性也比较多
参考资料
https://pkg.go.dev/golang.org/x/sync/errgroup
https://github.com/autom8ter/machine
https://github.com/Jeffail/tunny