Pop multiple slice. https://play.golang.org/p/RPwjo1HG_dI

main.go

package main

import "fmt"

func main() {
	a := make([]int, 5001)
	for i := 0; i < 5001; i++ {
		a[i] = i
	}

	//fmt.Println(a[50000:])

	for {
		var x []int
		if len(a) == 0 {
			break
		} else if len(a) < 500 {
			x, a = a[:len(a)], a[len(a):]
		} else {
			x, a = a[:500], a[500:]
		}

		test(x)
	}

	fmt.Println("for end")
	fmt.Println(a)
	fmt.Println(len(a))
}

func test(x []int) {
	fmt.Println(x)
	fmt.Println(len(x))
}