content: package com.alibaba.fastjson2.benchmark;
  
  import com.alibaba.fastjson2.JSONException;
  import com.alibaba.fastjson2.benchmark.eishay.EishayParseBinaryArrayMapping;
  import com.alibaba.fastjson2.util.JDKUtils;
  import org.apache.commons.io.IOUtils;
  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.io.InputStream;
  import java.lang.invoke.MethodHandle;
  import java.lang.invoke.MethodHandles;
  import java.lang.invoke.MethodType;
  import java.util.concurrent.TimeUnit;
  
  public class BytesAsciiCheck {
      static byte[] bytes;
      static char[] chars;
      static String str;
      static final MethodHandle INDEX_OF_CHAR;
  
      static {
          MethodHandle indexOfChar = null;
          try {
              try {
                  Class<?> cStringLatin1 = Class.forName("java.lang.StringLatin1");
                  MethodHandles.Lookup lookup = JDKUtils.trustedLookup(cStringLatin1);
                  indexOfChar = lookup.findStatic(
                          cStringLatin1,
                          "indexOfChar",
                          MethodType.methodType(int.class, byte[].class, int.class, int.class, int.class));
              } catch (Throwable ignored) {
                  // ignore
              }
          } catch (Exception e) {
              e.printStackTrace();
          }
  
          INDEX_OF_CHAR = indexOfChar;
          try {
              InputStream is = EishayParseBinaryArrayMapping.class.getClassLoader().getResourceAsStream("data/eishay.json");
              str = IOUtils.toString(is, "UTF-8");
              bytes = str.getBytes();
              chars = str.toCharArray();
          } catch (Exception e) {
              e.printStackTrace();
          }
      }
  
  //    @Benchmark
      public void handler(Blackhole bh) throws Throwable {
          bh.consume(
                  JDKUtils.METHOD_HANDLE_HAS_NEGATIVE.invoke(bytes, 0, bytes.length)
          );
      }
  
  //    @Benchmark
      public void lambda(Blackhole bh) throws Throwable {
          bh.consume(
                  JDKUtils.PREDICATE_IS_ASCII.test(bytes)
          );
      }
  
      @Benchmark
      public void direct(Blackhole bh) throws Throwable {
          bh.consume(hasNegatives(bytes, 0, bytes.length));
      }
  
      @Benchmark
      public void isASCII(Blackhole bh) throws Throwable {
          bh.consume(com.alibaba.fastjson2.util.IOUtils.isASCII(bytes, 0, bytes.length));
      }
  
      @Benchmark
      public void isNonSlashASCII(Blackhole bh) throws Throwable {
          bh.consume(com.alibaba.fastjson2.util.IOUtils.isNonSlashASCII(bytes, 0, bytes.length));
      }
  
  //    @Benchmark
      public void isLatin1(Blackhole bh) throws Throwable {
          bh.consume(com.alibaba.fastjson2.util.IOUtils.isLatin1(chars, 0, chars.length));
      }
  
  //    @Benchmark
      public void isASCIIJDK(Blackhole bh) throws Throwable {
          bh.consume(com.alibaba.fastjson2.util.JDKUtils.PREDICATE_IS_ASCII.test(bytes));
      }
  
      @Benchmark
      public void indexOfSlash(Blackhole bh) throws Throwable {
          bh.consume(com.alibaba.fastjson2.util.IOUtils.indexOfSlash(bytes, 0, bytes.length));
      }
  
      @Benchmark
      public void indexOfSlashV(Blackhole bh) throws Throwable {
          bh.consume(com.alibaba.fastjson2.util.IOUtils.indexOfSlashV(bytes, 0, bytes.length));
      }
  
      @Benchmark
      public void indexOfChar(Blackhole bh) throws Throwable {
          bh.consume(indexOfChar(bytes, '\'', 0, bytes.length));
      }
  
      @Benchmark
      public void indexOfString(Blackhole bh) throws Throwable {
          bh.consume(str.indexOf('\\'));
      }
  
      private static int indexOfChar(byte[] bytes, int ch, int fromIndex, int toIndex) {
          try {
              return (int) INDEX_OF_CHAR.invokeExact(bytes, ch, fromIndex, toIndex);
          } catch (Throwable ignored) {
              throw new JSONException("");
          }
      }
  
      public static boolean hasNegatives(byte[] ba, int off, int len) {
          for (int i = off; i < off + len; i++) {
              if (ba[i] < 0) {
                  return true;
              }
          }
          return false;
      }
  
      public static void main(String[] args) throws Exception {
          Options options = new OptionsBuilder()
                  .include(BytesAsciiCheck.class.getName())
                  .mode(Mode.Throughput)
                  .timeUnit(TimeUnit.MILLISECONDS)
                  .warmupIterations(3)
                  .threads(16)
                  .forks(1)
                  .build();
          new Runner(options).run();
      }
  }
  