diff --git a/src/main/java/com/profiler/interceptor/bci/ClassLoadChecker.java b/src/main/java/com/profiler/interceptor/bci/ClassLoadChecker.java
index ac3d3398d..5fd19aadd 100644
--- a/src/main/java/com/profiler/interceptor/bci/ClassLoadChecker.java
+++ b/src/main/java/com/profiler/interceptor/bci/ClassLoadChecker.java
@@ -8,6 +8,8 @@ import java.util.concurrent.ConcurrentMap;
 
 public class ClassLoadChecker {
     private final Logger logger = LoggerFactory.getLogger(ClassLoadChecker.class.getName());
+    private final boolean isDebug = logger.isDebugEnabled();
+
     private static final Object EXIST = new Object();
 
     private ConcurrentMap<LoadClass, Object> load = new ConcurrentHashMap<LoadClass, Object>();
@@ -16,13 +18,13 @@ public class ClassLoadChecker {
         LoadClass key = new LoadClass(cl, className);
         Object old = load.putIfAbsent(key, EXIST);
         if (old == null) {
-            if (logger.isInfoEnabled()) {
-                logger.info("{} not exist from ", cl);
+            if (isDebug) {
+                logger.debug("{} not exist from ", cl);
             }
             return false;
         }
-        if (logger.isInfoEnabled()) {
-            logger.info("{} already exist from ", cl);
+        if (isDebug) {
+            logger.debug("{} already exist from ", cl);
         }
         return true;
     }
diff --git a/src/main/java/com/profiler/logging/Slf4jLoggerAdapter.java b/src/main/java/com/profiler/logging/Slf4jLoggerAdapter.java
index dffaa6ffb..e2ce95ce6 100644
--- a/src/main/java/com/profiler/logging/Slf4jLoggerAdapter.java
+++ b/src/main/java/com/profiler/logging/Slf4jLoggerAdapter.java
@@ -54,7 +54,28 @@ public class Slf4jLoggerAdapter implements Logger {
         sb.append(methodName);
         sb.append(parameterDescription);
         sb.append(" args:");
-        sb.append(Arrays.toString(args));
+        appendArray(sb, args);
+    }
+
+    private static void appendArray(StringBuilder sb, Object[] args) {
+        if (args == null) {
+            sb.append("null");
+            return;
+        }
+        if (args.length == 0) {
+            return;
+        }
+
+        if (args.length > 0) {
+            sb.append('(');
+            sb.append(args[0]);
+            for (int i = 1; i < args.length; i++) {
+                sb.append(", ");
+                sb.append(args[i]);
+            }
+            sb.append(')');
+        }
+        return;
     }
 
     @Override