diff --git a/testable-agent/src/main/java/com/alibaba/testable/agent/handler/OmniClassHandler.java b/testable-agent/src/main/java/com/alibaba/testable/agent/handler/OmniClassHandler.java
index 3ca5777..ffab665 100644
--- a/testable-agent/src/main/java/com/alibaba/testable/agent/handler/OmniClassHandler.java
+++ b/testable-agent/src/main/java/com/alibaba/testable/agent/handler/OmniClassHandler.java
@@ -5,13 +5,16 @@ import com.alibaba.testable.agent.handler.test.JUnit5Framework;
 import com.alibaba.testable.agent.util.AnnotationUtil;
 import com.alibaba.testable.agent.util.BytecodeUtil;
 import com.alibaba.testable.agent.util.ClassUtil;
+import com.alibaba.testable.core.exception.ClassConstructionException;
 import com.alibaba.testable.core.util.CollectionUtil;
+import com.alibaba.testable.core.util.LogUtil;
 import com.alibaba.testable.core.util.StringUtil;
 import com.alibaba.testable.core.util.TypeUtil;
 import org.objectweb.asm.Label;
 import org.objectweb.asm.Type;
 import org.objectweb.asm.tree.*;
 
+import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
 
@@ -45,6 +48,8 @@ public class OmniClassHandler extends BaseClassHandler {
         JUnit4Framework.ANNOTATION_TEST, JUnit5Framework.ANNOTATION_TEST, JUnit5Framework.ANNOTATION_PARAMETERIZED_TEST
     };
 
+    private static final Map<String, Class<?>[]> constructorParameterCache = new HashMap<String, Class<?>[]>();
+
     @Override
     protected void transform(ClassNode cn) {
         if (isInterfaceOrAtom(cn) || isUniqueConstructorClass(cn) || isUninstantiableClass(cn) ||
@@ -66,8 +71,12 @@ public class OmniClassHandler extends BaseClassHandler {
             extraParameterCount = PRELOADED_CLASSES.get(cn.superName).length;
         } else if (cn.superName.startsWith("java/")) {
             try {
-                Class<?> superClazz = Class.forName(ClassUtil.toDotSeparatedName(cn.superName));
-                Class<?>[] constructorParameterTypes = TypeUtil.getBestConstructor(superClazz).getParameterTypes();
+                Class<?>[] constructorParameterTypes = constructorParameterCache.get(cn.superName);
+                if (constructorParameterTypes == null) {
+                    Class<?> superClazz = Class.forName(ClassUtil.toDotSeparatedName(cn.superName));
+                    constructorParameterTypes = TypeUtil.getBestConstructor(superClazz).getParameterTypes();
+                    constructorParameterCache.put(superClazz.getName(), constructorParameterTypes);
+                }
                 if (constructorParameterTypes.length == 0) {
                     constructor.instructions = invokeSuperWithoutTestableParameter(cn.superName, new String[0], start, end);
                     extraParameterCount = 0;
@@ -80,7 +89,8 @@ public class OmniClassHandler extends BaseClassHandler {
                     extraParameterCount = constructorParameterTypes.length;
                 }
             } catch (ClassNotFoundException e) {
-                constructor.instructions = invokeSuperWithTestableVoidParameter(cn.superName, start, end);
+                LogUtil.warn("[OmniConstructor] Failed to load class " + cn.superName);
+                constructor.instructions = invokeSuperWithoutTestableParameter(cn.superName, new String[0], start, end);
             }
         } else {
             constructor.instructions = invokeSuperWithTestableVoidParameter(cn.superName, start, end);
diff --git a/testable-agent/src/main/java/com/alibaba/testable/agent/util/BytecodeUtil.java b/testable-agent/src/main/java/com/alibaba/testable/agent/util/BytecodeUtil.java
index 57bea4b..3253706 100644
--- a/testable-agent/src/main/java/com/alibaba/testable/agent/util/BytecodeUtil.java
+++ b/testable-agent/src/main/java/com/alibaba/testable/agent/util/BytecodeUtil.java
@@ -188,7 +188,7 @@ public class BytecodeUtil {
     }};
 
     /**
-     * Java primitive type name to bytecode mapping
+     * java primitive type name to bytecode mapping
      */
     public static Map<String, String> PRIMITIVE_TYPE_NAME_MAP = new HashMap<String, String>() {{
         put("byte", String.valueOf((char)TYPE_BYTE));
@@ -202,7 +202,7 @@ public class BytecodeUtil {
     }};
 
     /**
-     * Get stack impact of a specified ops code
+     * get stack impact of a specified ops code
      * @param bytecode ops code to check
      * @return stack change
      */
@@ -211,7 +211,7 @@ public class BytecodeUtil {
     }
 
     /**
-     * Make sure method has public access
+     * make sure method has public access
      * @param access original access mark
      * @return access mark with public flag
      */
@@ -223,7 +223,7 @@ public class BytecodeUtil {
     }
 
     /**
-     * Dump byte code to specified class file
+     * dump byte code to specified class file
      * @param cn original class node
      * @param dumpPath folder to store class file
      * @param bytes original class bytes