diff --git a/hutool-core/src/test/java/cn/hutool/core/io/Issue3846Test.java b/hutool-core/src/test/java/cn/hutool/core/io/Issue3846Test.java
new file mode 100644
index 000000000..98a493dc2
--- /dev/null
+++ b/hutool-core/src/test/java/cn/hutool/core/io/Issue3846Test.java
@@ -0,0 +1,23 @@
+package cn.hutool.core.io;
+
+import cn.hutool.core.date.DateUtil;
+import cn.hutool.core.date.StopWatch;
+import cn.hutool.core.io.resource.ResourceUtil;
+import cn.hutool.core.lang.Console;
+import org.junit.jupiter.api.Disabled;
+import org.junit.jupiter.api.Test;
+
+import java.util.concurrent.TimeUnit;
+
+public class Issue3846Test {
+	@Test
+	@Disabled
+	void readBytesTest() {
+		final StopWatch stopWatch = DateUtil.createStopWatch();
+		stopWatch.start();
+		final String filePath = "d:/test/issue3846.data";
+		final byte[] bytes = IoUtil.readBytes(ResourceUtil.getStream(filePath), false);
+		stopWatch.stop();
+		Console.log(stopWatch.prettyPrint(TimeUnit.MILLISECONDS));
+	}
+}