add IOUtilsBench

benchmark/src/main/java/com/alibaba/fastjson2/benchmark/wast/IOUtilsBench.java

@@ -0,0 +1,45 @@
+package com.alibaba.fastjson2.benchmark.wast;
+
+import org.openjdk.jmh.annotations.Benchmark;
+import org.openjdk.jmh.annotations.Mode;
+import org.openjdk.jmh.infra.Blackhole;
+import org.openjdk.jmh.runner.Runner;
+import org.openjdk.jmh.runner.options.Options;
+import org.openjdk.jmh.runner.options.OptionsBuilder;
+
+import java.util.concurrent.TimeUnit;
+
+public class IOUtilsBench {
+    static byte[] bytes;
+    static char[] chars;
+    static String str;
+
+    static {
+        StringBuilder buf = new StringBuilder();
+        for (int i = 0; i < 1000; i++) {
+            buf.append(12345678);
+        }
+        str = buf.toString();
+        bytes = str.getBytes();
+        chars = str.toCharArray();
+    }
+
+    @Benchmark
+    public void digit4(Blackhole bh) throws Throwable {
+        for (int i = 0; i < 1000; i += 8) {
+            bh.consume(com.alibaba.fastjson2.util.IOUtils.digit4(bytes, 0));
+        }
+    }
+
+    public static void main(String[] args) throws Exception {
+        Options options = new OptionsBuilder()
+                .include(IOUtilsBench.class.getName())
+                .mode(Mode.Throughput)
+                .timeUnit(TimeUnit.MILLISECONDS)
+                .warmupIterations(3)
+                .threads(1)
+                .forks(1)
+                .build();
+        new Runner(options).run();
+    }
+}