func Benchmark_TerrorParallelGetting(b *testing.B) {
	errs := []Terror{
		E_IO{},
		E_Network{},
		TE0{},
		TE1{},
		TE2{},
		TE3{},
		TE4{},
		TE5{},
		TE6{},
		TE7{},
		TE8{},
		TE9{},
	}
	b.SetParallelism(4)
	b.RunParallel(func(b *testing.PB) {
		var which int
		for b.Next() {
			which = (which + 1) % 12
			err := errs[which]
			hier := GetHierarchy(reflect.TypeOf(err))
			_ = hier
		}
	})
}