WTF is wrong with your perfomance??

[kzorin52]

Benchmark:	Method	Mean	Error	StdDev
BouncyCastlePub	484.89 us	7.248 us	6.780 us
NBitcoinSecp256K1Pub	123.40 us	0.765 us	0.716 us
NBitcoinPub	114.46 us	0.973 us	0.862 us
NativePub	36.64 us	0.432 us	0.404 us
EcdsaLibPub	80.81 us	0.792 us	0.702 us
NethermindPub	25.18 us	0.187 us	0.166 us
LibplanetPub	963.74 us	13.782 us	12.892 us

Code:

public class Secp256K1Tests
{
    private const int N = 32;
    private readonly byte[] _data;
    private readonly ReadOnlyMemory<byte> _dataSpan;
    private readonly Memory<byte> _dataMemory;

    private static readonly X9ECParameters Curve = SecNamedCurves.GetByName("secp256k1");
    private static readonly ECDomainParameters Params = new(Curve.Curve, Curve.G, Curve.N, Curve.H, Curve.GetSeed());
    private static readonly Secp256k1 Secp256K1 = new();

    public Secp256K1Tests()
    {
        _data = new byte[N];
        new Random(121).NextBytes(_data);
        _dataSpan = new ReadOnlyMemory<byte>(_data);
        _dataMemory = _data.AsMemory();
    }

    [Benchmark]
    public byte[] BouncyCastlePub()
    {
        var key = new ECPrivateKeyParameters(new BigInteger(1, _dataSpan.Span), Params);
        return key.Parameters.G.Multiply(key.D).GetEncoded(true);
    }

    [Benchmark]
    public byte[] NBitcoinSecp256K1Pub()
    {
        using var prv = NBitcoin.Secp256k1.ECPrivKey.Create(_dataSpan.Span);
        return prv.CreatePubKey().ToBytes(true);
    }

    [Benchmark]
    public byte[] NBitcoinPub()
    {
        return new NBitcoin.Key(_data).PubKey.ToBytes();
    }

    [Benchmark]
    public byte[] NativePub()
    {
        Span<byte> pub = stackalloc byte[64];
        Secp256K1.PublicKeyCreate(pub, _dataMemory.Span);

        Span<byte> pubCompr = stackalloc byte[33];
        Secp256K1.PublicKeySerialize(pubCompr, pub, Flags.SECP256K1_EC_COMPRESSED);

        return pubCompr.ToArray();
    }

    [Benchmark]
    public byte[] EcdsaLibPub()
    {
        return Cryptography.ECDSA.Secp256K1Manager.GetPublicKey(_data, true);
    }

    [Benchmark]
    public byte[] NethermindPub()
    {
        return Nethermind.Crypto.SecP256k1.GetPublicKey(_data, true)!;
    }

    [Benchmark]
    public byte[] LibplanetPub()
    {
        return [.. new Libplanet.Crypto.PrivateKey(_data).PublicKey.ToImmutableArray(true)];
    }
}

[riemannulus]

Thank you for reporting the issue. Since we are using Pub, which wraps BouncyCastle, there should not be much difference in performance from BouncyCastle. Please tell me which version of BouncyCastle you used in your testing.

[kzorin52]

Hi, latest

[riemannulus]

@kzorin52 can you add this line for use BouncyCastle binding?

CryptoConfig.CryptoBackend = new Secp256k1CryptoBackend<SHA256>();

Maybe you need to import Libplanet.Crypto.Secp256k1 package too.