add CharBufferJmh

hutool-core/src/test/java/org/dromara/hutool/core/io/buffer/BufferUtilTest.java

@@ -14,16 +14,15 @@
  * limitations under the License.
  */
 
-package org.dromara.hutool.core.io;
+package org.dromara.hutool.core.io.buffer;
 
-import java.nio.ByteBuffer;
-
-import org.dromara.hutool.core.io.buffer.BufferUtil;
 import org.dromara.hutool.core.text.StrUtil;
 import org.dromara.hutool.core.util.CharsetUtil;
 import org.junit.jupiter.api.Assertions;
 import org.junit.jupiter.api.Test;
 
+import java.nio.ByteBuffer;
+
 /**
  * BufferUtil单元测试
  *

hutool-core/src/test/java/org/dromara/hutool/core/io/buffer/CharBufferJmh.java

@@ -0,0 +1,40 @@
+package org.dromara.hutool.core.io.buffer;
+
+import org.openjdk.jmh.annotations.*;
+
+import java.util.concurrent.TimeUnit;
+
+@BenchmarkMode(Mode.AverageTime)//每次执行平均花费时间
+@Warmup(iterations = 1, time = 1, timeUnit = TimeUnit.SECONDS) //预热1次调用
+@Measurement(iterations = 5, time = 1, timeUnit = TimeUnit.SECONDS) // 执行5此，每次1秒
+@Threads(1) //单线程
+@Fork(1) //
+@OutputTimeUnit(TimeUnit.NANOSECONDS) // 单位：纳秒
+@State(Scope.Benchmark) // 共享域
+public class CharBufferJmh {
+
+	private final int appendCount = 10000;
+	private String str;
+
+	@Setup
+	public void setup() {
+		str = "abc123你好";
+	}
+
+	@SuppressWarnings("MismatchedQueryAndUpdateOfStringBuilder")
+	@Benchmark
+	public void stringBuilderJmh() {
+		final StringBuilder stringBuilder = new StringBuilder(1024);
+		for (int i = 0; i < appendCount; i++) {
+			stringBuilder.append(str);
+		}
+	}
+
+	@Benchmark
+	public void fastCharBufferJmh() {
+		final FastCharBuffer fastCharBuffer = new FastCharBuffer(1024);
+		for (int i = 0; i < appendCount; i++) {
+			fastCharBuffer.append(str);
+		}
+	}
+}