d := delta
			if d >= len(b) {
				d = len(b)
			}
			castagnoli.Write(b[:d])
			castagnoli.Write(b[d:])
			return castagnoli.Sum32()
		})
	}
}

func BenchmarkCRC32(b *testing.B) {
	b.Run("poly=IEEE", benchmarkAll(NewIEEE()))
	b.Run("poly=Castagnoli", benchmarkAll(New(MakeTable(Castagnoli))))
	b.Run("poly=Koopman", benchmarkAll(New(MakeTable(Koopman))))
}