golang 删除切片的某个元素及剔除切片内的零值方式

func remove(slice []interface{}, elem interface{}) []interface{}{
    if len(slice) == 0 {
        return slice
    }
    for i, v := range slice {
        if v == elem {
            slice = append(slice[:i], slice[i+1:]...)
            return remove(slice,elem)
            break
        }
    }
    return slice
}
func removeZero(slice []interface{}) []interface{}{
    if len(slice) == 0 {
        return slice
    }
    for i, v := range slice {
        if ifZero(v) {
            slice = append(slice[:i], slice[i+1:]...)
            return removeZero(slice)
            break
        }
    }
    return slice
}

//判断一个值是否为零值，只支持string,float,int,time 以及其各自的指针，"%"和"%%"也属于零值范畴，场景是like语句
func IfZero(arg interface{}) bool {
    if arg == nil {
        return true
    }
    switch v := arg.(type) {
    case int, int32, int16, int64:
        if v == 0 {
            return true
        }
    case float32:
        r:=float64(v)
        return math.Abs(r-0)<0.0000001
    case float64:
        return math.Abs(v-0)<0.0000001
    case string:
        if v == "" || v == "%%" || v == "%" {
            return true
        }
    case *string, *int, *int64, *int32, *int16, *int8, *float32, *float64, *time.Time:
        if v == nil {
            return true
        }
    case time.Time:
        return v.IsZero()
    default:
        return false
    }
    return false
}

func DeleteSlice(a []int) []int{
 for i := 0; i < len(a); i++ {
  if a[i] == 0 {
   a = append(a[:i], a[i+1:]...)
   i--
  }
 }
 return a
}

func DeleteSlice1(a []int) []int {
 ret := make([]int, 0, len(a))
 for _, val := range a {
  if val == 1 {
   ret = append(ret, val)
  }
 }
 return ret
}

func DeleteSlice2(a []int) []int{
 j := 0
 for _, val := range a {
  if val == 1 {
   a[j] = val
   j++
  }
 }
 return a[:j]
}

package main 
import (
 "testing"
)
 
func handle(data []int) {
 return
}
const N = 100
 
func getSlice()[]int {
 a := []int{}
 for i := 0; i < N; i++ {
  if i % 2 == 0 {
   a = append(a, 0)
  } else {
   a = append(a, 1)
  }
 }
 return a
}
 
func BenchmarkDeleteSlice(b *testing.B) {
 for i := 0; i < b.N; i++ {
   data := DeleteSlice(getSlice())
   handle(data)
 }
}
 
func BenchmarkDeleteSlice1(b *testing.B) {
 for i := 0; i < b.N; i++ {
  data := DeleteSlice1(getSlice())
  handle(data)
 }
}
 
func BenchmarkDeleteSlice2(b *testing.B) {
 for i := 0; i < b.N; i++ {
  data := DeleteSlice2(getSlice())
  handle(data)
 }
}