public async Task TestCache()
{
var userRepository = new UserRepository();
var stopwatch = new Stopwatch();
stopwatch.Start();
var userName = await userRepository.GetUserNameAsync(Guid.Empty);
stopwatch.Stop();
Console.WriteLine($"userName {userName} was loaded in {stopwatch.ElapsedMilliseconds}ms");
Assert.True(stopwatch.ElapsedMilliseconds >= 3000);
var cachedRepository = CacheDispatchProxy <IUserRepository> .Create(userRepository,
new MemoryCache(new MemoryCacheOptions()), TimeSpan.FromDays(1));
stopwatch.Restart();
userName = await cachedRepository.GetUserNameAsync(Guid.Empty);
stopwatch.Stop();
var firstLoadTime = stopwatch.ElapsedMilliseconds;
Console.WriteLine($"[cache proxy] userName {userName} was loaded in {firstLoadTime}ms - first time");
stopwatch.Restart();
userName = await cachedRepository.GetUserNameAsync(Guid.Empty);
stopwatch.Stop();
Console.WriteLine(
$"[cache proxy] userName {userName} was loaded in {stopwatch.ElapsedMilliseconds}ms - second time");
}
public async Task TestPerformance()
{
// arrange
var mockUserRepository = new Mock <IUserRepository>();
mockUserRepository.Setup(u => u.GetUserNameAsync(It.IsAny <Guid>()))
.Returns(Task.FromResult("roylab"));
var userRepository = mockUserRepository.Object;
var stopwatch = new Stopwatch();
stopwatch.Start();
var cachedUserRepository = CacheDispatchProxy <IUserRepository> .Create(userRepository,
new MemoryCache(new MemoryCacheOptions()), TimeSpan.FromDays(1));
stopwatch.Stop();
Console.WriteLine($"dynamic proxy takes {stopwatch.ElapsedMilliseconds}ms to create");
// act
stopwatch.Restart();
for (var i = 0; i < 100; i++)
{
await userRepository.GetUserNameAsync(Guid.Empty);
}
stopwatch.Stop();
var backendRepositoryTime = stopwatch.ElapsedMilliseconds;
stopwatch.Restart();
for (var i = 0; i < 100; i++)
{
await cachedUserRepository.GetUserNameAsync(Guid.Empty);
}
stopwatch.Stop();
var cachedRepositoryTime = stopwatch.ElapsedMilliseconds;
// assert
Console.WriteLine($"backend repository takes {backendRepositoryTime}ms to complete");
Console.WriteLine($"cached repository takes {cachedRepositoryTime}ms to complete");
var timeOverhead = cachedRepositoryTime - backendRepositoryTime;
Console.WriteLine($"dispatch proxy has {timeOverhead}ms time overhead.");
}
