Setup
- .NET 4.5.1
- Memcached local server (Northscale)
- AWS ElastiCache, cache.r3.2xlarge, 2 nodes
- Using Enyim client library for Memcached
- 10,000 Gets and Puts of string data
- 10,000 unique keys
The results
| Memory Manager | GET – Total ms | GET – Average ms | SET – Total ms | SET – Average ms |
|---|---|---|---|---|
| .NET MemoryCache | 6.354 | 0.0006 | 3.515 | 0.0004 |
| Memcached - Local Server | 802.329 | 0.0802 | 761.066 | 0.0761 |
| AWS ElastiCache | 807.002 | 0.0807 | 763.705 | 0.0764 |
The Code
static void Main(string[] args)
{
try
{
TestAccess();
MemoryCacheTest();
MemcachedTest();
Console.ReadKey();
}
catch (Exception ex)
{
Console.WriteLine(ex.ToString());
Console.ReadKey();
}
}
static List<String> GetKeys()
{
var keys = new List<String>();
for (int i = 0; i < reps; i++)
keys.Add(Guid.NewGuid().ToString());
return keys;
}
static int reps = 10000;
static void MemoryCacheTest()
{
ObjectCache cache = MemoryCache.Default;
Stopwatch sw = new Stopwatch();
List<String> keys = GetKeys();
CacheItemPolicy policy = new CacheItemPolicy() { };
sw.Start();
for (int i = 0; i< reps; i++)
{
cache.Set(keys[i], keys[i], policy);
}
sw.Stop();
ReportTiming(".NET MemoryCache SET", sw.Elapsed);
sw.Reset();
sw.Start();
for (int i = 0; i < reps; i++)
{
cache.Get(keys[i]);
}
sw.Stop();
ReportTiming(".NET MemoryCache GET", sw.Elapsed);
}
static void MemcachedTest()
{
using (MemcachedClient client = new MemcachedClient())
{
Stopwatch sw = new Stopwatch();
List<String> keys = GetKeys();
CacheItemPolicy policy = new CacheItemPolicy() { };
sw.Start();
for (int i = 0; i < reps; i++)
{
client.Store(StoreMode.Set, keys[i], keys[i]);
}
sw.Stop();
ReportTiming("MemCached SET", sw.Elapsed);
sw.Reset();
sw.Start();
for (int i = 0; i < reps; i++)
{
client.Get<String>(keys[i]);
}
sw.Stop();
ReportTiming("MemCached GET", sw.Elapsed);
}
}
static void ReportTiming(String label, TimeSpan elapsedTime)
{
Console.WriteLine("{0}: {1:N3} ms", label, elapsedTime.TotalMilliseconds);
Console.WriteLine(" Average per operation: {0:N4} ms", elapsedTime.TotalMilliseconds / reps);
}
static void TestAccess()
{
using (MemcachedClient client = new MemcachedClient())
{
var key = "LastProcessed";
var val = DateTime.Now.Ticks;
long valRetrieved;
Console.WriteLine("Storing Key: {0}, Value: {1}",
key, val);
client.Store(StoreMode.Set, key, val);
valRetrieved = client.Get<long>(key);
Console.WriteLine("Retrieved Value: {0}, Key: {1}",
valRetrieved, key);
if (val != valRetrieved)
Console.WriteLine("Memcached access FAILED");
else
Console.WriteLine("Memcached access OK");
}
}
}
