improved WebURIStat & Proxy.

src/main/java/com/alibaba/druid/proxy/jdbc/PreparedStatementProxyImpl.java

@@ -108,7 +108,10 @@ public class PreparedStatementProxyImpl extends StatementProxyImpl implements Pr
             parametersSize = jdbcIndex;
         }
         if (parametersSize >= parameters.length) {
-            parameters = Arrays.copyOf(parameters, parametersSize + 16);
+            int oldCapacity = parameters.length;
+            int newCapacity = oldCapacity + (oldCapacity >> 1);
+
+            parameters = Arrays.copyOf(parameters, newCapacity);
         }
         parameters[index] = parameter;
         

src/main/java/com/alibaba/druid/support/http/stat/WebURIStat.java

@@ -178,9 +178,9 @@ public class WebURIStat {
         requestTimeNanoUpdater.addAndGet(this, nanos);
 
         for (;;) {
-            long current = requestTimeNanoUpdater.get(this);
+            long current = requestTimeNanoMaxUpdater.get(this);
             if (current < nanos) {
-                if (requestTimeNanoUpdater.compareAndSet(this, current, nanos)) {
+                if (requestTimeNanoMaxUpdater.compareAndSet(this, current, nanos)) {
                     // 可能不准确，但是绝大多数情况下都会正确，性能换取一致性
                     requestTimeNanoMaxOccurTime = System.currentTimeMillis();