elasticsearch elasticsearch请求的高延迟

我正在使用传输客户端对数据进行索引。下面是一个小测试程序：

@Test
public void LatencyTest() throws Exception {
    // warmup
    for (int i = 0; i < 10; i++) {
        client.prepareGet("ts_head", "doc", "latency_test_id").get();
    }

    List<Long> times = Lists.newArrayList();
    for (int i = 0; i < 100; i++) {
        final long t1 = System.nanoTime();
        final IndexResponse response = client.prepareIndex("ts_head", "doc", "latency_test_id").setSource("{}", XContentType.JSON).get();
        final long t2 = System.nanoTime();
        times.add(t2 - t1);
    }
    final double average = times.stream().mapToLong(v -> v).average().getAsDouble();
    System.out.println("Average time: " + (average / 1_000_000f) + "ms");
}

通过HTTP编制索引的速度也相当慢：

$ curl -w "@curl-format.txt" -X POST -s "http://172.***:9200/ts_head/doc/latency_test_id" --data '{}'
{"_index":"ts_head","_type":"doc","_id":"latency_test_id","_version":211,"result":"updated","_shards":{"total":2,"successful":2,"failed":0},"created":false}    time_namelookup:  0,001381
       time_connect:  0,135607
    time_appconnect:  0,000000
   time_pretransfer:  0,136056
      time_redirect:  0,000000
 time_starttransfer:  0,283840
                    ----------
         time_total:  0,284044

现在我的问题是：我做错了什么？Elasticsearch肯定能够更快地编制索引，对吗

为了进行测试，我还读取了数据，它报告了

“take”：1

，但仍然持续超过100ms，无法通过curl进行响应

$ curl -w "@curl-format.txt" -X POST -s "http://172.***:9200/ts_head/doc/latency_test_id" --data '{}'
{"_index":"ts_head","_type":"doc","_id":"latency_test_id","_version":211,"result":"updated","_shards":{"total":2,"successful":2,"failed":0},"created":false}    time_namelookup:  0,001381
       time_connect:  0,135607
    time_appconnect:  0,000000
   time_pretransfer:  0,136056
      time_redirect:  0,000000
 time_starttransfer:  0,283840
                    ----------
         time_total:  0,284044