diff --git a/README.md b/README.md
index 3964559..fe42c08 100644
--- a/README.md
+++ b/README.md
@@ -36,6 +36,7 @@ gradle
 调试信息类型有：
  * `launch` 有关 authlib-injector 加载的
  * `transform` 有关字节码修改的
+ * `transform.skipped` 分析了却未执行字节码修改的类（用于性能分析）
  * `config` 有关配置获取的
  * `httpd` 有关本地 HTTP 服务器的（其负责在本地处理掉部分请求，而不是发送到 Yggdrasil 服务端）
 
diff --git a/src/main/java/moe/yushi/authlibinjector/transform/ClassTransformer.java b/src/main/java/moe/yushi/authlibinjector/transform/ClassTransformer.java
index b45e757..4572fce 100644
--- a/src/main/java/moe/yushi/authlibinjector/transform/ClassTransformer.java
+++ b/src/main/java/moe/yushi/authlibinjector/transform/ClassTransformer.java
@@ -89,7 +89,7 @@ public class ClassTransformer implements ClassFileTransformer {
 					}
 					return classBuffer;
 				} else {
-					Logging.TRANSFORM.fine("No transformation is applied to [" + className + "]");
+					Logging.TRANSFORM_SKIPPED.fine("No transformation is applied to [" + className + "]");
 					return null;
 				}
 			} catch (Throwable e) {
diff --git a/src/main/java/moe/yushi/authlibinjector/util/Logging.java b/src/main/java/moe/yushi/authlibinjector/util/Logging.java
index bda3677..67b32e2 100644
--- a/src/main/java/moe/yushi/authlibinjector/util/Logging.java
+++ b/src/main/java/moe/yushi/authlibinjector/util/Logging.java
@@ -23,6 +23,7 @@ public final class Logging {
 	public static final Logger LAUNCH = Logger.getLogger(PREFIX + ".launch");
 	public static final Logger CONFIG = Logger.getLogger(PREFIX + ".config");
 	public static final Logger TRANSFORM = Logger.getLogger(PREFIX + ".transform");
+	public static final Logger TRANSFORM_SKIPPED = Logger.getLogger(PREFIX + ".transform.skipped");
 	public static final Logger HTTPD = Logger.getLogger(PREFIX + ".httpd");
 
 	public static void init() {