class Date20Write {
    static String str;
    static Date20Field object;
    static ObjectMapper mapper = new ObjectMapper();

    public Date20Write() {
        try {
            InputStream is = Date20Write.class.getClassLoader().getResourceAsStream("data/date20.json");
            str = IOUtils.toString(is, "UTF-8");
            object = JSON.parseObject(str, Date20Field.class);
            mapper.setDateFormat(new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"));
        } catch (Exception ex) {
            ex.printStackTrace();
        }
    }

    @Benchmark
    public void fastjson1(Blackhole bh) {
        bh.consume(
                com.alibaba.fastjson.JSON.toJSONString(object)
        );
    }

    @Benchmark
    public void fastjson2(Blackhole bh) {
        bh.consume(
                JSON.toJSONString(object)
        );
    }

    @Benchmark
    public void fastjson2_jsonb(Blackhole bh) {
        bh.consume(
                JSONB.toBytes(object)
        );
    }

    @Benchmark
    public void jackson(Blackhole bh) throws Exception {
        bh.consume(
                mapper.writeValueAsString(object)
        );
    }

    public void wastjson(Blackhole bh) throws Exception {
        bh.consume(
                io.github.wycst.wast.json.JSON.toJsonString(object)
        );
    }

    public static void main(String[] args) throws RunnerException {<FILL_FUNCTION_BODY>}
}

        Options options = new OptionsBuilder()
                .include(Date20Write.class.getName())
                .mode(Mode.Throughput)
                .timeUnit(TimeUnit.MILLISECONDS)
                .warmupIterations(3)
                .forks(1)
                .build();
        new Runner(options).run();
    
<no_super_class>