The JIT is doing all the work, it appears. https://pastebin.com/TvJ8Y9cq https://pastebin.com/TvJ8Y9cq private static final byte[] _16 = new byte[16];

The JIT is doing all the work, it appears. https://pastebin.com/TvJ8Y9cq https://pastebin.com/TvJ8Y9cq private static final byte[] _16 = new byte[16]; @Setup(Level.Trial) public void setUp() { final byte[] _eight = new byte[_16.length / 2]; new Random(System.currentTimeMillis() + System.nanoTime()) .nextBytes(_eight); FastHex.encodeBytes(_eight, 0, _eight.length, _16, 0); } @Benchmark @Fork(value = 1, warmups = 1) @BenchmarkMode(Mode.Throughput) @Warmup(iterations = 1) @Measurement(iterations = 3) public void largeHexFast(Blackhole blackhole) { blackhole.consume(FasterHex.decode(0, _16.length, i -> _16[i])); }