BeanUtils.copyProperties 和 fastjson 性能对比

曾经终败给现在 2023-06-05 08:16 30阅读 0赞

# BeanUtils.copyProperties 和 fastjson 性能对比 #

## 声明 ##

> 测试方法非严格方式, 测试结果以及结论仅供参考!  
> 测试方法非严格方式, 测试结果以及结论仅供参考!  
> 测试方法非严格方式, 测试结果以及结论仅供参考!

#### 运行环境 ####

*  cpu: i5-8400(6c 6t 3.8主频)
 *  内存: 16G(2666频率)\*2
 *  系统: Mac OS 10.14.6 (18G95)
 *  java环境: jdk1.8.0\_171

#### 测试样本 ####

用json输出大概是7kb

#### 对比测试方法 ####

`BeanUtils.copyProperties`有的字段无法正确复制, 我们用`json`序列化(兼容性好)来进行对比测试  
`json` 工具使用的是阿里 `fastJson`

> 由于测试循环中加入了一个检测是否新建对象的逻辑(防止程序自动优化出现假的字段拷贝), 所以实际执行时间会比给出的测试耗时要稍微短一点

## 第一轮测试(10次循环) ##

#### 测试次数 ####

10次循环

#### 测试结果 ####

测试结果相差无几, 有时 `BeanUtils` 快点, 有时 `json` 的方式快点, 应该是样本量太小导致成绩受系统波动的影响太大  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM0MjA4ODQ0_size_16_color_FFFFFF_t_70]

## 第二轮测试(100次循环) ##

#### 测试次数 ####

100次循环

#### 测试结果 ####

<table> 
 <thead> 
  <tr> 
   <th>序号</th> 
   <th>方式</th> 
   <th>耗时</th> 
  </tr> 
 </thead> 
 <tbody> 
  <tr> 
   <td>1</td> 
   <td>BeanUtils</td> 
   <td>4ms</td> 
  </tr> 
  <tr> 
   <td>1</td> 
   <td>json</td> 
   <td>41ms</td> 
  </tr> 
  <tr> 
   <td>2</td> 
   <td>BeanUtils</td> 
   <td>4ms</td> 
  </tr> 
  <tr> 
   <td>2</td> 
   <td>json</td> 
   <td>47ms</td> 
  </tr> 
  <tr> 
   <td>3</td> 
   <td>BeanUtils</td> 
   <td>1ms</td> 
  </tr> 
  <tr> 
   <td>3</td> 
   <td>json</td> 
   <td>13ms</td> 
  </tr> 
  <tr> 
   <td>4</td> 
   <td>BeanUtils</td> 
   <td>1ms</td> 
  </tr> 
  <tr> 
   <td>4</td> 
   <td>json</td> 
   <td>11ms</td> 
  </tr> 
 </tbody> 
</table>

已经体现出一些差距了

## 第三轮测试(1000次循环) ##

#### 测试次数 ####

1000次循环

#### 测试结果 ####

<table> 
 <thead> 
  <tr> 
   <th>序号</th> 
   <th>方式</th> 
   <th>耗时</th> 
  </tr> 
 </thead> 
 <tbody> 
  <tr> 
   <td>1</td> 
   <td>BeanUtils</td> 
   <td>8ms</td> 
  </tr> 
  <tr> 
   <td>1</td> 
   <td>json</td> 
   <td>110ms</td> 
  </tr> 
  <tr> 
   <td>2</td> 
   <td>BeanUtils</td> 
   <td>3ms</td> 
  </tr> 
  <tr> 
   <td>2</td> 
   <td>json</td> 
   <td>61ms</td> 
  </tr> 
  <tr> 
   <td>3</td> 
   <td>BeanUtils</td> 
   <td>2ms</td> 
  </tr> 
  <tr> 
   <td>3</td> 
   <td>json</td> 
   <td>67ms</td> 
  </tr> 
  <tr> 
   <td>4</td> 
   <td>BeanUtils</td> 
   <td>3ms</td> 
  </tr> 
  <tr> 
   <td>4</td> 
   <td>json</td> 
   <td>67ms</td> 
  </tr> 
 </tbody> 
</table>

1000次循环的轻度下大约是20倍的性能差距, 不过波动还是比较大, 我们继续增加次数

## 第四轮测试(10000次循环) ##

#### 测试次数 ####

10000次循环

#### 测试结果 ####

<table> 
 <thead> 
  <tr> 
   <th>序号</th> 
   <th>方式</th> 
   <th>耗时</th> 
  </tr> 
 </thead> 
 <tbody> 
  <tr> 
   <td>1</td> 
   <td>BeanUtils</td> 
   <td>33ms</td> 
  </tr> 
  <tr> 
   <td>1</td> 
   <td>json</td> 
   <td>638ms</td> 
  </tr> 
  <tr> 
   <td>2</td> 
   <td>BeanUtils</td> 
   <td>33ms</td> 
  </tr> 
  <tr> 
   <td>2</td> 
   <td>json</td> 
   <td>643ms</td> 
  </tr> 
  <tr> 
   <td>3</td> 
   <td>BeanUtils</td> 
   <td>25ms</td> 
  </tr> 
  <tr> 
   <td>3</td> 
   <td>json</td> 
   <td>621ms</td> 
  </tr> 
  <tr> 
   <td>4</td> 
   <td>BeanUtils</td> 
   <td>31ms</td> 
  </tr> 
  <tr> 
   <td>4</td> 
   <td>json</td> 
   <td>630ms</td> 
  </tr> 
 </tbody> 
</table>

还是大约是20倍左右的性能差距, 第三组蹦跶到快25倍了

## 第五轮测试(200000次循环) ##

#### 测试次数 ####

200000次循环

#### 测试结果 ####

![111][]  
![222][]  
![333][]  
![444][]  
依旧是20倍左右的差距, 循环200000次但新建对象不是预期的200000而总是少10个左右…

## 结论 ##

使用 `BeanUtils` 自动复制字段, 性能大概是 `json序列化` 方式复制字段的`20倍`, 不过如果对象不是十分复杂, 这个差距可以接受, 性能不敏感的话可以考虑使用 `json序列化` 的方式进行字段复制

## 源码 ##

测试关键逻辑源码

final int testNums = 200000;
        Map<String, String> map = Maps.newHashMap("key", "value");
        long startTime1 = nowMillis();
        int num = testNums;
        int count = 0;
        while (num > 0) { 
            num--;
            count++;
            Page<EvaluationUserWithResult> tempReturnPage = new Page<>();
            BeanUtils.copyProperties(evaluationUserPage, tempReturnPage);
            map.put(tempReturnPage.hashCode() + "", tempReturnPage.hashCode() +"");
    
        }
        log.error("beanutil循环{}次, 新建临时对象{}个, 用时{}", count, map.size()-1, DateTimeStyle.duration(startTime1));
    
    
        long startTime2 = nowMillis();
        num = testNums;
        map = Maps.newHashMap("key", "value");
        count = 0;
        while (num > 0) { 
            num--;
            count++;
            Page<EvaluationUserWithResult> tempReturnPage = new Page<>();
            tempReturnPage = JSON.parseObject(JSON.toJSONString(evaluationUserPage), tempReturnPage.getClass());
            map.put(tempReturnPage.hashCode() + "", tempReturnPage.hashCode() +"");
        }
        log.error("json循环{}次, 新建临时对象{}个, 用时{}", count, map.size()-1, DateTimeStyle.duration(startTime2));

## 样本数据 ##

{ 
        "code": 0,
        "msg": "成功",
        "data": { 
            "itemsWithResult": [
                { 
                    "maxProgress": 6,
                    "hmoId": "CYH3211204110000",
                    "medChannel": 2,
                    "updateTime": 1569746589000,
                    "evaluationTime": 1569746589000,
                    "userName": "202",
                    "itemsResult": { 
                        "bc": "",
                        "op": "较高风险",
                        "dyslipemia": "高危",
                        "diab": "已患病",
                        "lungcnacer": "暂无风险",
                        "stroke": "中危人群",
                        "cvd": "较高风险",
                        "pc": "暂无风险",
                        "sportrisk": "较高风险",
                        "hbp": "高风险",
                        "疾病类型": "疾病风险程度",
                        "depression": "可能有重度抑郁倾向",
                        "obesity": "正常"
                    },
                    "userAge": 39,
                    "evaluationId": "8a3147b08opsf878da8622525389fd26",
                    "userUnit": "gryh",
                    "createTime": 1569745748000,
                    "medChannelDesc": "医生录入",
                    "userMobile": "99300000202",
                    "progress": 6,
                    "personId": "test2",
                    "userGender": 1,
                    "id": 546,
                    "evaluationKey": "PersonalHealthRiskEvaluation",
                    "evaluationState": 1
                },
                { 
                    "maxProgress": 6,
                    "hmoId": "CYH3211204110000",
                    "medChannel": 2,
                    "updateTime": 1569745630000,
                    "evaluationTime": 1569745629000,
                    "userName": "32423",
                    "itemsResult": { 
                        "bc": "",
                        "op": "较低风险",
                        "dyslipemia": " 低危",
                        "diab": "已患病",
                        "lungcnacer": "暂无风险",
                        "stroke": "高危人群",
                        "cvd": "中等风险",
                        "pc": "高危",
                        "sportrisk": "较高风险",
                        "hbp": "已异常",
                        "疾病类型": "疾病风险程度",
                        "depression": "可能有重度抑郁倾向",
                        "obesity": "正常"
                    },
                    "userAge": 39,
                    "evaluationId": "833a6eac1dbss673f54f44f5c1c62d7a",
                    "userUnit": "gryh",
                    "createTime": 1563876718000,
                    "medChannelDesc": "医生录入",
                    "userMobile": "15999999999",
                    "progress": 6,
                    "personId": "test2",
                    "userGender": 1,
                    "id": 495,
                    "evaluationKey": "PersonalHealthRiskEvaluation",
                    "evaluationState": 1
                },
                { 
                    "maxProgress": 6,
                    "hmoId": "CYH3211204110000",
                    "medChannel": 2,
                    "updateTime": 1563876694000,
                    "evaluationTime": 1563876693000,
                    "userName": "测试",
                    "itemsResult": { 
                        "bc": "",
                        "op": "较低风险",
                        "dyslipemia": " 低危",
                        "diab": "高风险",
                        "lungcnacer": " 低危",
                        "stroke": "低危人群",
                        "cvd": "较低风险",
                        "pc": "高危",
                        "sportrisk": "中等风险",
                        "hbp": "中等风险",
                        "疾病类型": "疾病风险程度",
                        "depression": "可能有中重度抑郁倾向",
                        "obesity": "正常"
                    },
                    "userAge": 39,
                    "evaluationId": "2a9ggg508e47412fc5cc092d7ae7c05e",
                    "userUnit": "gryh",
                    "createTime": 1557737311000,
                    "medChannelDesc": "医生录入",
                    "userMobile": "15999930566",
                    "progress": 6,
                    "personId": "test1",
                    "userGender": 1,
                    "id": 487,
                    "evaluationKey": "PersonalHealthRiskEvaluation",
                    "evaluationState": 1
                },
                { 
                    "maxProgress": 7,
                    "hmoId": "CYH3211204110000",
                    "medChannel": 1,
                    "updateTime": 1562763683000,
                    "evaluationTime": 1557473650000,
                    "userName": "测试2",
                    "itemsResult": { 
                        "bc": "较高风险",
                        "op": "较低风险",
                        "dyslipemia": " 低危",
                        "diab": "高风险",
                        "lungcnacer": "暂无风险",
                        "stroke": "低危人群",
                        "cvd": "高风险",
                        "pc": "",
                        "sportrisk": "较低风险",
                        "hbp": "高风险",
                        "疾病类型": "疾病风险程度",
                        "depression": "可能有中度抑郁倾向",
                        "obesity": "超重"
                    },
                    "userAge": 39,
                    "evaluationId": "ba8cd69396f3603e6e7b27e7f77d5a4a",
                    "userUnit": "gryh",
                    "createTime": 1557473530000,
                    "medChannelDesc": "用户填写",
                    "userMobile": "手机号2",
                    "progress": 7,
                    "personId": "test3",
                    "userGender": 2,
                    "id": 483,
                    "evaluationKey": "PersonalHealthRiskEvaluation",
                    "evaluationState": 4
                },
                { 
                    "maxProgress": 6,
                    "hmoId": "CYH3211204110000",
                    "medChannel": 1,
                    "updateTime": 1557473641000,
                    "evaluationTime": 1557473641000,
                    "userName": "测试2",
                    "itemsResult": { 
                        "bc": "",
                        "op": "较低风险",
                        "dyslipemia": " 低危",
                        "diab": "高风险",
                        "lungcnacer": "暂无风险",
                        "stroke": "低危人群",
                        "cvd": "较高风险",
                        "pc": "极高危",
                        "sportrisk": "中等风险",
                        "hbp": "高风险",
                        "疾病类型": "疾病风险程度",
                        "depression": "可能有重度抑郁倾向",
                        "obesity": "超重"
                    },
                    "userAge": 39,
                    "evaluationId": "edf65b5a233cfd2eggf1c548374cde8f",
                    "userUnit": "gryh",
                    "createTime": 1557473249000,
                    "medChannelDesc": "用户填写",
                    "userMobile": "手机号2",
                    "progress": 6,
                    "personId": "test",
                    "userGender": 1,
                    "id": 482,
                    "evaluationKey": "PersonalHealthRiskEvaluation",
                    "evaluationState": 1
                }
            ],
            "pageNo": 1,
            "pageSize": 5,
            "pageCount": 3,
            "recordCount": 13
        }
    }

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM0MjA4ODQ0_size_16_color_FFFFFF_t_70]: /images/20230601/1a00b74cc197402cb24395137079a5f3.png
[111]: /images/20230601/b1119587f44a43b7a2cb61b19ebeb4cd.png
[222]: /images/20230601/3ecef631f8ef40ef98e69d2dae85506d.png
[333]: /images/20230601/e21a97cdb12f4b5b91dabf4a6351f0e1.png
[444]: /images/20230601/dd4c52ce8b224a0eae46700eac1c0b1c.png