sodium_durations.dart

import 'dart:ffi';
import 'dart:typed_data';
import 'package:sodium/sodium.dart';

void main() async {
  // INCLUDE THE CORRECT PATH...
  final libsodium = DynamicLibrary.open('path\\to\\libsodium.dll'); 

  // initialize the sodium APIs
  final sodium = await SodiumInit.init(libsodium);

  final stopWatchForEncrypt = Stopwatch();

  // The message to be encrypted, converted to an unsigned char array.
  const String message = 'my very secret message';

  Uint8List inputBytes = Uint8List.fromList(List.filled(100000000, 0));

  // A randomly generated nonce
  final nonce = sodium.randombytes.buf(
    sodium.crypto.secretBox.nonceBytes,
  );

  // Generate a secret key
  final SecureKey key = sodium.crypto.secretBox.keygen();

  // Encrypt the data
  print('--------------------------------------------');
  print('Beginning sodium.crypto.secretBox.easy() ...');
  stopWatchForEncrypt.start();
  final encryptedData = sodium.crypto.secretBox.easy(
    message: inputBytes, 
    nonce: nonce,
    key: key,
  );
  stopWatchForEncrypt.stop;

  print(
      'duration for sodium.crypto.secretBox.easy:  ${stopWatchForEncrypt.elapsed}');

  print('------------------------------------------');
  print('Beginning sodium.crypto.aead.encrypt() ...');
  stopWatchForEncrypt.reset();
  stopWatchForEncrypt.start();
  final encryptedData2 = sodium.crypto.aead.encrypt(
    message: inputBytes, //messageBytes,
    nonce: nonce,
    key: key,
  );
  stopWatchForEncrypt.stop();

  print(
      'duration for sodium.crypto.aead.encrypt:  ${stopWatchForEncrypt.elapsed}');

  // after you are done:
  key.dispose();

  print('done');
}