Added benchmark code

Author: oschwald

sample/Benchmark.java

@@ -0,0 +1,35 @@
+import java.io.File;
+import java.io.IOException;
+import java.net.InetAddress;
+import java.util.Random;
+
+import com.fasterxml.jackson.databind.JsonNode;
+import com.google.common.net.InetAddresses;
+import com.maxmind.maxminddb.MaxMindDbException;
+import com.maxmind.maxminddb.Reader;
+import com.maxmind.maxminddb.Reader.FileMode;
+
+public class Benchmark {
+
+    public static void main(String[] args) throws IOException,
+            MaxMindDbException {
+        File file = new File("GeoIP2-City.mmdb");
+
+        Reader r = new Reader(file, FileMode.MEMORY_MAPPED);
+        Random random = new Random();
+        int count = 1000000;
+        long startTime = System.nanoTime();
+        for (int i = 0; i < count; i++) {
+            InetAddress ip = InetAddresses.fromInteger(random.nextInt());
+            if (i % 50000 == 0) {
+                System.out.println(i + " " + ip);
+            }
+            JsonNode t = r.get(ip);
+        }
+        long endTime = System.nanoTime();
+
+        long duration = endTime - startTime;
+        System.out.println("Requests per second: " + count * 1000000000.0
+                / (duration));
+    }
+}