package main
import (
     "fmt"
     "time"
     "strings"
 )
func main() {
   sText := "aasdfasd:fasdf"
   
   st := time.Now().UnixNano()
   count :=0
   for i:=1 ; i<1000000 ; i++ {
		if idx := strings.IndexAny(sText, ":") ; idx != -1{
			count++
		} 
   }
   ed := time.Now().UnixNano()
   
   fmt.Println("===>", count, ed-st)
   
   st = time.Now().UnixNano()
   count =0
   for i:=1 ; i<1000000 ; i++ {
		if idx := strings.Index(sText, ":") ; idx != -1{
			count++
		} 
   }
   ed = time.Now().UnixNano()
   
   fmt.Println("===>", count, ed-st)
   
   st = time.Now().UnixNano()
   count =0
   for i:=1 ; i<1000000 ; i++ {
		if strings.Contains(sText, ":") {
			count++
		} 
   }
   ed = time.Now().UnixNano()
   
   fmt.Println("===>", count, ed-st)
}