substack-allocate-small-objects.go

type T struct {
    X int32 // 4B
}

var global interface{}

func BenchmarkAllocOnHeap(b *testing.B) {
    b.ReportAllocs()
    for i := 0; i <= b.N; i++ {
        global = &T{}
    }
}

func BenchmarkAllocOnStack(b *testing.B) {
    b.ReportAllocs()
    for i := 0; i <= b.N; i++ {
        local := T{}
        _ = local
    }
}