package main

import "testing"

type Small struct {
    a int
}

type Big struct {
    a, b, c, d, e, f, g, h int
}

////////////////

func moveSmall(item *Small) {
    *item = Small{0}
}

func setSmall(item *Small) {
    item.a = 0
}

func moveBig(item *Big) {
    *item = Big{0, 1, 2, 3, 4, 5, 6, 7}
}

func setBig(item *Big) {
    item.a, item.b, item.c, item.d, item.e, item.f, item.g, item.h = 0, 1, 2, 3, 4, 5, 6, 7
}

////////////////

func BenchmarkMoveSmallStruct(b *testing.B) {
    item := Small{0}
    for i := 0; i < b.N; i++ {
        moveSmall(&item)
    }
}

func BenchmarkSetSmallStruct(b *testing.B) {
    item := Small{0}
    for i := 0; i < b.N; i++ {
        setSmall(&item)
    }
}

func BenchmarkMoveBigStruct(b *testing.B) {
    item := Big{0, 1, 2, 3, 4, 5, 6, 7}
    for i := 0; i < b.N; i++ {
        moveBig(&item)
    }
}

func BenchmarkSetBigStruct(b *testing.B) {
    item := Big{0, 1, 2, 3, 4, 5, 6, 7}
    for i := 0; i < b.N; i++ {
        setBig(&item)
    }
}