diff --git a/hutool-core/src/test/java/org/dromara/hutool/core/io/Issue3846Test.java b/hutool-core/src/test/java/org/dromara/hutool/core/io/Issue3846Test.java
new file mode 100644
index 000000000..1a8522c3f
--- /dev/null
+++ b/hutool-core/src/test/java/org/dromara/hutool/core/io/Issue3846Test.java
@@ -0,0 +1,23 @@
+package org.dromara.hutool.core.io;
+
+import org.dromara.hutool.core.date.DateUtil;
+import org.dromara.hutool.core.date.StopWatch;
+import org.dromara.hutool.core.io.resource.ResourceUtil;
+import org.dromara.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));
+	}
+}
diff --git a/hutool-core/src/test/resources/issue3846.txt b/hutool-core/src/test/resources/issue3846.txt
new file mode 100644
index 000000000..20ce5c0a6
--- /dev/null
+++ b/hutool-core/src/test/resources/issue3846.txt
@@ -0,0 +1 @@
+f1f5eafa000a0000828974000800680000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000